diff --git a/SheepShaver/Makefile b/SheepShaver/Makefile
index b7248d1b..42e4bac2 100644
--- a/SheepShaver/Makefile
+++ b/SheepShaver/Makefile
@@ -75,7 +75,7 @@ links:
 	       Windows/kernel_windows.h Windows/kernel_windows.cpp \
 	       Windows/serial_windows.cpp Windows/router Windows/b2ether \
 	       Windows/ether_windows.h Windows/ether_windows.cpp \
-	       Windows/serial_windows.cpp'; \
+	       Windows/serial_windows.cpp Windows/prefs_editor_gtk.cpp'; \
 	PREFIX="`pwd`/"; case $(B2_TOPDIR) in /*) PREFIX="";; esac; \
 	for i in $$list; do \
 	  echo $$i; \
diff --git a/SheepShaver/src/Windows/Makefile.in b/SheepShaver/src/Windows/Makefile.in
index 826fa1cc..a8623119 100755
--- a/SheepShaver/src/Windows/Makefile.in
+++ b/SheepShaver/src/Windows/Makefile.in
@@ -13,12 +13,18 @@ man1dir = $(mandir)/man1
 
 DESTDIR =
 
+SDL_CFLAGS = @SDL_CFLAGS@
+SDL_LIBS = @SDL_LIBS@
+WANT_GTK = @WANT_GTK@
+GTK_CFLAGS = @GTK_CFLAGS@
+GTK_LIBS = @GTK_LIBS@
+
 LN_S = @LN_S@
 WINDRES = @WINDRES@
 CC = @CC@
 CXX = @CXX@
-CFLAGS = @CFLAGS@
-CXXFLAGS = @CXXFLAGS@
+CFLAGS = @CFLAGS@ $(SDL_CFLAGS)
+CXXFLAGS = @CXXFLAGS@ $(SDL_CFLAGS)
 CPPFLAGS = @CPPFLAGS@ -I../include -I.
 DEFS = @DEFS@
 LDFLAGS = @LDFLAGS@
@@ -55,14 +61,24 @@ SRCS = ../main.cpp main_windows.cpp ../prefs.cpp ../prefs_items.cpp prefs_window
     about_window_windows.cpp ../user_strings.cpp user_strings_windows.cpp \
     ../dummy/prefs_editor_dummy.cpp clip_windows.cpp util_windows.cpp kernel_windows.cpp \
     vm_alloc.cpp sigsegv.cpp posix_emu.cpp SheepShaver.rc $(CPUSRCS) $(ROUTERSRCS)
+
+UI_SRCS = ../prefs.cpp prefs_windows.cpp prefs_editor_gtk.cpp xpram_windows.cpp \
+	../prefs_items.cpp ../user_strings.cpp user_strings_windows.cpp SheepShaverGUI.rc
+
+UI_APP = SheepShaverGUI.exe
+
 APP = SheepShaver.exe
 
+ifeq ($(WANT_GTK),yes)
+PROGS += $(UI_APP)
+endif
+
 ## Rules
 .PHONY: clean distclean
 .SUFFIXES:
 .SUFFIXES: .c .cpp .S .o .h
 
-all: $(APP)
+all: $(PROGS)
 
 $(UNIXSRCS): %: ../Unix/%
 	$(LN_S) $< $@
@@ -77,6 +93,12 @@ define SRCS_LIST_TO_OBJS
 endef
 OBJS = $(SRCS_LIST_TO_OBJS)
 
+define UI_SRCS_LIST_TO_OBJS
+	$(addprefix $(OBJ_DIR)/, $(addsuffix .o, $(foreach file, $(UI_SRCS), \
+	$(basename $(notdir $(file))))))
+endef
+UI_OBJS = $(UI_SRCS_LIST_TO_OBJS)
+
 define DYNGENSRCS_LIST_TO_OBJS
 	$(addprefix $(OBJ_DIR)/, $(addsuffix .ho, $(foreach file, $(DYNGENSRCS), \
 	$(basename $(notdir $(file))))))
@@ -88,15 +110,21 @@ VPATH :=
 VPATH += $(addprefix :, $(subst  ,:, $(filter-out $($(subst, :, ,$(VPATH))), $(SRC_PATHS))))
 
 $(APP): $(UNIXSRCS) $(OBJ_DIR) $(OBJS)
-	$(CXX) -o $(APP) $(LDFLAGS) $(OBJS) $(LIBS)
+	$(CXX) -o $(APP) $(LDFLAGS) $(OBJS) $(LIBS) $(SDL_LIBS)
 
-clean:
+$(UI_APP): $(UNIXSRCS) $(OBJ_DIR) $(UI_OBJS)
+	$(CXX) -o $@ $(LDFLAGS) $(UI_OBJS) $(LIBS) $(GTK_LIBS) -mwindows -mno-cygwin
+
+mostlyclean:
+	rm -f $(APP) $(UI_APP) $(OBJ_DIR)/* core* *.core *~ *.bak
+
+clean: mostlyclean
 	rm -f $(UNIXSRCS)
-	rm -f $(APP) $(OBJ_DIR)/* core* *.core *~ *.bak ppc-execute-impl.cpp
-	rm -f dyngen basic-dyngen-ops.hpp ppc-dyngen-ops.hpp
+	rm -f dyngen basic-dyngen-ops.hpp ppc-dyngen-ops.hpp ppc-execute-impl.cpp
 
 distclean: clean
 	rm -rf $(OBJ_DIR)
+	rm -rf autom4te.cache
 	rm -f Makefile
 	rm -f config.cache config.log config.status config.h
 
@@ -117,6 +145,8 @@ $(OBJ_DIR)/%.o : %.S
 	$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $*.out.s
 	$(AS) $(ASFLAGS) -o $@ $*.out.s
 	rm $*.out.s
+$(OBJ_DIR)/prefs_editor_gtk.o: prefs_editor_gtk.cpp
+	$(CXX) -O2 -mno-cygwin -mms-bitfields $(CPPFLAGS) $(DEFS) $(GTK_CFLAGS) -c $< -o $@
 
 # Windows resources
 $(OBJ_DIR)/%.o: %.rc
diff --git a/SheepShaver/src/Windows/SheepShaverGUI.ico b/SheepShaver/src/Windows/SheepShaverGUI.ico
new file mode 100755
index 00000000..67d4c55f
Binary files /dev/null and b/SheepShaver/src/Windows/SheepShaverGUI.ico differ
diff --git a/SheepShaver/src/Windows/SheepShaverGUI.rc b/SheepShaver/src/Windows/SheepShaverGUI.rc
new file mode 100644
index 00000000..db7ed548
--- /dev/null
+++ b/SheepShaver/src/Windows/SheepShaverGUI.rc
@@ -0,0 +1,2 @@
+SheepShaverGUI ICON PRELOAD "SheepShaverGUI.ico"
+
diff --git a/SheepShaver/src/Windows/configure.ac b/SheepShaver/src/Windows/configure.ac
index 41a2ccd5..d5196d55 100755
--- a/SheepShaver/src/Windows/configure.ac
+++ b/SheepShaver/src/Windows/configure.ac
@@ -13,6 +13,7 @@ AC_CANONICAL_TARGET
 
 dnl Options.
 AC_ARG_ENABLE(jit,          [  --enable-jit            enable JIT compiler [default=yes]], [WANT_JIT=$enableval], [WANT_JIT=yes])
+AC_ARG_WITH(gtk,          [  --with-gtk              use GTK user interface [default=yes]], [WANT_GTK=$withval], [WANT_GTK=yes])
 
 dnl Checks for programs.
 AC_PROG_CC
@@ -24,6 +25,15 @@ AC_PROG_LN_S
 AC_PATH_PROG(PERL, [perl])
 AC_CHECK_TOOL(WINDRES, windres)
 
+dnl We use GTK+ if possible.
+if [[ "x$WANT_GTK" = "xyes" ]]; then
+  AM_PATH_GTK_2_0(1.3.15, [], [
+    AC_MSG_WARN([Could not find GTK+ 2.0, disabling user interface.])
+    WANT_GTK=no
+  ])
+fi
+AC_SUBST(WANT_GTK)
+
 dnl We use 64-bit file size support if possible.
 AC_SYS_LARGEFILE
 
@@ -202,11 +212,10 @@ CPUSRCS="$CPUSRCS ../kpx_cpu/sheepshaver_glue.cpp"
 
 dnl We really want SDL for now
 AC_CHECK_TOOL(sdl_config, sdl-config, [AC_MSG_ERROR([Sorry, you currently need SDL for this port])])
-sdl_cflags=`$sdl_config --cflags`
-sdl_libs=`$sdl_config --libs`
-CFLAGS="$CFLAGS $sdl_cflags"
-CXXFLAGS="$CXXFLAGS $sdl_cflags"
-LIBS="$LIBS $sdl_libs"
+SDL_CFLAGS=`$sdl_config --cflags`
+AC_SUBST(SDL_CFLAGS)
+SDL_LIBS=`$sdl_config --libs`
+AC_SUBST(SDL_LIBS)
 AC_DEFINE(USE_SDL, 1, [Define to enble SDL support])
 AC_DEFINE(USE_SDL_VIDEO, 1, [Define to enable SDL video graphics support])
 AC_DEFINE(USE_SDL_AUDIO, 1, [Define to enable SDL audio support])
@@ -230,5 +239,6 @@ echo
 echo SheepShaver configuration summary:
 echo
 echo Enable JIT compiler .............. : $WANT_JIT
+echo GTK user interface ............... : $WANT_GTK
 echo
 echo "Configuration done. Now type \"make\"."
diff --git a/SheepShaver/src/Windows/user_strings_windows.cpp b/SheepShaver/src/Windows/user_strings_windows.cpp
index 2a794c73..61eef464 100755
--- a/SheepShaver/src/Windows/user_strings_windows.cpp
+++ b/SheepShaver/src/Windows/user_strings_windows.cpp
@@ -47,6 +47,32 @@ user_string_def platform_strings[] = {
 	{STR_WINDOW_TITLE_GRABBED, "SheepShaver (mouse grabbed, press Ctrl-F5 to release)"},
 	{STR_NO_WIN32_NT_4, "SheepShaver does not run on Windows NT versions less than 4.0"},
 
+	{STR_PREFS_MENU_FILE_GTK, "/_File"},
+	{STR_PREFS_ITEM_START_GTK, "/File/_Start SheepShaver"},
+	{STR_PREFS_ITEM_ZAP_PRAM_GTK, "/File/_Zap PRAM File"},
+	{STR_PREFS_ITEM_SEPL_GTK, "/File/sepl"},
+	{STR_PREFS_ITEM_QUIT_GTK, "/File/_Quit SheepShaver"},
+	{STR_HELP_MENU_GTK, "/_Help"},
+	{STR_HELP_ITEM_ABOUT_GTK, "/Help/_About SheepShaver"},
+
+	{STR_FILE_CTRL, "File"},
+	{STR_BROWSE_TITLE, "Browse file"},
+	{STR_BROWSE_CTRL, "Browse..."},
+	{STR_SERIAL_PANE_TITLE, "Serial"},
+	{STR_NETWORK_PANE_TITLE, "Network"},
+	{STR_INPUT_PANE_TITLE, "Keyboard/Mouse"},
+	{STR_KEYCODES_CTRL, "Use Raw Keycodes"},
+	{STR_KEYCODE_FILE_CTRL, "Keycode Translation File"},
+	{STR_MOUSEWHEELMODE_CTRL, "Mouse Wheel Function"},
+	{STR_MOUSEWHEELMODE_PAGE_LAB, "Page Up/Down"},
+	{STR_MOUSEWHEELMODE_CURSOR_LAB, "Cursor Up/Down"},
+	{STR_MOUSEWHEELLINES_CTRL, "Lines To Scroll"},
+	{STR_POLLMEDIA_CTRL, "Try to automatically detect new removable media (enable polling)"},
+	{STR_EXTFS_ENABLE_CTRL, "Enable \"My Computer\" icon on your Mac desktop (external file system)"},
+	{STR_EXTFS_DRIVES_CTRL, "Mount drives"},
+	{STR_ETHER_FTP_PORT_LIST_CTRL, "FTP ports"},
+	{STR_ETHER_TCP_PORT_LIST_CTRL, "Server ports"},
+
 	{-1, NULL}	// End marker
 };
 
diff --git a/SheepShaver/src/Windows/user_strings_windows.h b/SheepShaver/src/Windows/user_strings_windows.h
index ec1e4032..63b9a1a4 100755
--- a/SheepShaver/src/Windows/user_strings_windows.h
+++ b/SheepShaver/src/Windows/user_strings_windows.h
@@ -40,6 +40,32 @@ enum {
 	STR_OPEN_WINDOW_ERR,
 	STR_WINDOW_TITLE_GRABBED,
 	STR_NO_WIN32_NT_4,
+
+	STR_PREFS_MENU_FILE_GTK,
+	STR_PREFS_ITEM_START_GTK,
+	STR_PREFS_ITEM_ZAP_PRAM_GTK,
+	STR_PREFS_ITEM_SEPL_GTK,
+	STR_PREFS_ITEM_QUIT_GTK,
+	STR_HELP_MENU_GTK,
+	STR_HELP_ITEM_ABOUT_GTK,
+
+	STR_FILE_CTRL,
+	STR_BROWSE_CTRL,
+	STR_BROWSE_TITLE,
+	STR_SERIAL_PANE_TITLE,
+	STR_NETWORK_PANE_TITLE,
+	STR_INPUT_PANE_TITLE,
+	STR_KEYCODES_CTRL,
+	STR_KEYCODE_FILE_CTRL,
+	STR_MOUSEWHEELMODE_CTRL,
+	STR_MOUSEWHEELMODE_PAGE_LAB,
+	STR_MOUSEWHEELMODE_CURSOR_LAB,
+	STR_MOUSEWHEELLINES_CTRL,
+	STR_POLLMEDIA_CTRL,
+	STR_EXTFS_ENABLE_CTRL,
+	STR_EXTFS_DRIVES_CTRL,
+	STR_ETHER_FTP_PORT_LIST_CTRL,
+	STR_ETHER_TCP_PORT_LIST_CTRL,
 };
 
 #endif
diff --git a/SheepShaver/src/include/user_strings.h b/SheepShaver/src/include/user_strings.h
index 24fa5f35..162ad645 100644
--- a/SheepShaver/src/include/user_strings.h
+++ b/SheepShaver/src/include/user_strings.h
@@ -74,6 +74,8 @@ enum {
 	STR_PREFS_ITEM_ZAP_PRAM,
 	STR_PREFS_ITEM_QUIT,
 
+	STR_NONE_LAB = 3100,
+
 	// Volumes pane
 	STR_VOLUMES_PANE_TITLE = 3200,
 	STR_ADD_VOLUME_BUTTON,
@@ -99,6 +101,7 @@ enum {
 	STR_REF_15HZ_LAB,
 	STR_REF_30HZ_LAB,
 	STR_REF_60HZ_LAB,
+	STR_REF_DYNAMIC_LAB,
 	STR_GFXACCEL_CTRL,
 	STR_8_BIT_CTRL,
 	STR_16_BIT_CTRL,
diff --git a/SheepShaver/src/user_strings.cpp b/SheepShaver/src/user_strings.cpp
index 1ff6516f..1eb0dd9f 100644
--- a/SheepShaver/src/user_strings.cpp
+++ b/SheepShaver/src/user_strings.cpp
@@ -87,6 +87,8 @@ user_string_def common_strings[] = {
 	{STR_PREFS_ITEM_ZAP_PRAM, "Zap PRAM File"},
 	{STR_PREFS_ITEM_QUIT, "Quit SheepShaver"},
 
+	{STR_NONE_LAB, "<none>"},
+
 	{STR_VOLUMES_PANE_TITLE, "Volumes"},
 	{STR_ADD_VOLUME_BUTTON, "Add" ELLIPSIS},
 	{STR_CREATE_VOLUME_BUTTON, "Create" ELLIPSIS},
@@ -109,6 +111,7 @@ user_string_def common_strings[] = {
 	{STR_REF_15HZ_LAB, "15 Hz"},
 	{STR_REF_30HZ_LAB, "30 Hz"},
 	{STR_REF_60HZ_LAB, "60 Hz"},
+	{STR_REF_DYNAMIC_LAB, "Dynamic"},
 	{STR_GFXACCEL_CTRL, "QuickDraw Acceleration"},
 	{STR_8_BIT_CTRL, "8 Bit"},
 	{STR_16_BIT_CTRL, "15 Bit"},