@interface NSFileManager (MacFanatic)
- (unsigned long) sizeOfDirectory:(NSString*)dir;	// Bytes
- (unsigned long) sizeOfFile:(NSString*)file;		// Bytes
- (BOOL)setInvisibilityFlag:(BOOL)invisible forPath:(NSString*)path;
@end

- (unsigned long) sizeOfDirectory:(NSString*)dir {
 
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	NSFileManager* manager = [NSFileManager defaultManager];
 
	unsigned long size = 0;
	NSDirectoryEnumerator *e = [manager enumeratorAtPath:dir];
	NSString* file = nil;
 
	while ( file = [e nextObject] ) {
		size += [manager sizeOfFile:[dir stringByAppendingPathComponent:file]];
	}
 
	[pool release];
 
	return size;
 
}