I just got a new drive for the PC that I run iTunes on-a SATA 250GB MONSTER! I want to move everything to the new drive, and of course I want my iTunes to work. Unfortunately, the iTunes help is unhelpful here. Most of my music is MP3s that I ripped myself from my CD collection, but I have some that I've bought through the ITMS. What tricks and traps should I be aware of when moving my purchased iTunes music?