diff --git a/bin/po2do.js b/bin/po2do.js
new file mode 100644
index 0000000..8474c6f
--- /dev/null
+++ b/bin/po2do.js
@@ -0,0 +1,39 @@
+kMap = [0x00,
+        0x0E,
+        0x0D,
+        0x0C,
+        0x0B,
+        0x0A,
+        0x09,
+        0x08,
+        0x07,
+        0x06,
+        0x05,
+        0x04,
+        0x03,
+        0x02,
+        0x01,
+        0x0F
+       ]
+
+a = new ActiveXObject("scripting.filesystemobject")
+for (b = new Enumerator(a.GetFolder(WScript.Arguments(0)).files); !b.atEnd(); b.moveNext())
+{
+    if (a.GetExtensionName(b.item()).toLowerCase() == "po")
+    {
+        fi = a.opentextfile(b.item())
+        fo = a.createtextfile(WScript.Arguments(1)+"\\"+a.GetBaseName(b.item())+".dsk", 1)
+        for (track = 0; track < 0x23; ++track)
+        {
+            sectors = new Array(0x10)
+            for (dos_sector = 0; dos_sector < 0x10; ++dos_sector)
+            {
+                sectors[kMap[dos_sector]] = fi.read(256)
+            }
+            for (dos_sector = 0; dos_sector < 0x10; ++dos_sector)
+            {
+                fo.write(sectors[dos_sector])
+            }
+        }
+    }
+}
diff --git a/winmake.bat b/winmake.bat
index af26dde..f99e342 100644
--- a/winmake.bat
+++ b/winmake.bat
@@ -4,6 +4,9 @@ if "%1" equ "clean" (
 echo y|1>nul rd build /s
 goto :EOF
 )
+
+set BUILDDISK=build\passport
+
 set ACME=acme
 set EXOMIZER=exomize
 set CADIUS=cadius
@@ -28,6 +31,8 @@ cd ..
 1>nul copy res\work.po build\passport.po
 1>nul copy res\_FileInformation.txt build\
 %CADIUS% ADDFILE "build\passport.po" "/PASSPORT/" "build\PASSPORT.SYSTEM"
+cscript /nologo bin/po2do.js build\ build\
+2>nul del "%BUILDDISK%.po"
 goto :EOF
 */
 new ActiveXObject("scripting.filesystemobject").createtextfile("tmp").write(String.fromCharCode(parseInt(WScript.arguments(0),16),String.fromCharCode(parseInt(WScript.arguments(1),16))))