diff --git a/Cocoa/Categories/NSNumber-Range.h b/Cocoa/Categories/NSNumber-Range.h
new file mode 100644
index 0000000..ade3a12
--- /dev/null
+++ b/Cocoa/Categories/NSNumber-Range.h
@@ -0,0 +1,9 @@
+#import <Foundation/Foundation.h>
+
+@interface NSNumber (ResKnifeRangeExtensions)
+
+- (BOOL)isWithinRange:(NSRange)range;				// location <= self <= location+length
+- (BOOL)isExclusivelyWithinRange:(NSRange)range;	// location < self < location+length
+- (BOOL)isBoundedByRange:(NSRange)range;			// location <= self < location+length
+
+@end
diff --git a/Cocoa/Categories/NSNumber-Range.m b/Cocoa/Categories/NSNumber-Range.m
new file mode 100644
index 0000000..f62a57c
--- /dev/null
+++ b/Cocoa/Categories/NSNumber-Range.m
@@ -0,0 +1,23 @@
+#import "NSNumber-Range.h"
+
+@implementation NSNumber (ResKnifeRangeExtensions)
+
+- (BOOL)isWithinRange:(NSRange)range				// location <= self <= location+length
+{
+	// e.g. for {6,1} a value of 6.000 will return true, as will 7.000
+	return [self compare:[NSNumber numberWithInt:range.location]] != NSOrderedAscending && [self compare:[NSNumber numberWithInt:range.location+range.length]] != NSOrderedDescending;
+}
+
+- (BOOL)isExclusivelyWithinRange:(NSRange)range		// location < self < location+length
+{
+	// e.g. for {6,1} a value of 6.000 will return false, 6.001 will return true, 6.999 will return true, 7.000 false
+	return [self compare:[NSNumber numberWithInt:range.location]] == NSOrderedDescending && [self compare:[NSNumber numberWithInt:range.location+range.length]] == NSOrderedAscending;
+}
+
+- (BOOL)isBoundedByRange:(NSRange)range				// location <= self < location+length
+{
+	// e.g. for {6,1} a value of 6.000 will return true, 6.999 will return true, 7.000 will not
+	return [self compare:[NSNumber numberWithInt:range.location]] != NSOrderedAscending && [self compare:[NSNumber numberWithInt:range.location+range.length]] == NSOrderedAscending;
+}
+
+@end
diff --git a/Cocoa/Categories/NSString-FSSpec.h b/Cocoa/Categories/NSString-FSSpec.h
new file mode 100644
index 0000000..1d9bf7f
--- /dev/null
+++ b/Cocoa/Categories/NSString-FSSpec.h
@@ -0,0 +1,8 @@
+#import <Foundation/Foundation.h>
+
+@interface NSString (ResKnifeFSSpecExtensions)
+
+- (FSRef *)createFSRef;
+- (FSSpec *)createFSSpec;
+
+@end
diff --git a/Cocoa/Categories/NSString-FSSpec.m b/Cocoa/Categories/NSString-FSSpec.m
new file mode 100644
index 0000000..d3193e8
--- /dev/null
+++ b/Cocoa/Categories/NSString-FSSpec.m
@@ -0,0 +1,28 @@
+#import "NSString-FSSpec.h"
+
+@implementation NSString (ResKnifeFSSpecExtensions)
+
+- (FSRef *)createFSRef
+{
+	FSRef *fsRef = NULL;
+	OSStatus error = FSPathMakeRef( [self fileSystemRepresentation], &fsRef, NULL );
+	if( error == noErr )
+		return fsRef;
+	return NULL;
+}
+
+- (FSSpec *)createFSSpec
+{
+	FSRef *fsRef = NULL;
+	FSSpec *fsSpec = NULL;
+	OSStatus error = FSPathMakeRef( [self fileSystemRepresentation], &fsRef, NULL );
+	if( error == noErr )
+	{
+		error = FSGetCatalogInfo( &fsRef, kFSCatInfoNone, NULL, NULL, fsSpec, NULL );
+		if( error == noErr )
+			return fsSpec;
+	}
+	return NULL;
+}
+
+@end