wyrwulf, I tried that option about 20 times, and b***r me if I could get it to work! All it did was add numbers before the file names, which is not what I wanted. I frequently number folders of thumbnails 001 - 099 or whatever, and with Rename Files I can also add text before the number, like pose001 - pose099. Looking at the interface again, I see that maybe I needed to check 'remove filename' at the same time. Ah well, Rename Files does everything I need. mac