I have been using uControl for years to convert the enter key to the command key on my older TiBook (now there are command keys on both sides of the space bar). I use the right side command to motor through tracks, chapters, and volume in iTunes and iDVD (with the help of the arrows). I also use the scrolling capabilities (which allow you to convert the trackpad to scroll while holding the function key). As you might guess, uControl no longer works in Panther. I'm keeping my eyes out for other solutions, but if anyone knows of another app that has this functionality, I'm on it like a fumble. Thanks!