"there's also a pc program that will check out wrongly placed files and correct them" I'm not sure what you mean by this? do you mean it checks inside the poser files and changes the file paths to reflect the current locations of the file? What else is needed? Esther is right I've ported my dittoGUI to Cocoa and it's all but ready. What I've got works well, it's just user interface additions, like buttons as well as the current Menu Options. And a couple of little additions. I'll take some time out of my current project to do that tomorrow. (Don't tell the boss) I'm not sure on ditto's arg limits on the the number of folders it can do in one batch, I'll have to check that:-) What number of top level folders are you wanting?