All, I am totally a newbie to mac programming and macs in general as well. What I am trying to do is to change 1 filename, by copying and pasting another file name, and then appending something to the end. So the source is File1.mp3 is the source name I and to pick a target file, copy the "File1.mp3" + .asd (append this) and have this be the name of the target file. Anybody have any idea how I can do this? or if there is any utility that can do this?