A new Mac user here. Been using APPZAPPER to uninstall programs, and for the most part I thought it worked pretty thoroughly at removing all traces of any installed program.... that is, until I tried uninstalling ADOBE PHOTOSHOP CS2. I removed all traces of the program, or so I had thought, but it still resides in my system's memory as when I try to install CS3 there is a conflict with the old software. How can I make absolutely certain that all traces of a software installed are completely removed from the system's memory including registration keys, etc? Thanks!