I once accomplished this before on my old iMac G3 because I had two installations of OS X running on seperate partitions. I was able to run either version when ever I wanted. I want to do this again, but not have to have two OS X installs. Here's my reasoning. I need iTunes 9 to sync my iPod because I have a touch, however I hate the bloat and would like to use iTunes 3 or 4 for just casual MP3 listening. I tried using Pacifist but iTunes 3 refuses to run. Was it my method or is it something to do with iTunes 3 not liking Leopard?