I am having a nightmarish time with Parallels right now. I have a MBP, OS 10.4. I've been running Parallels 2.5 with an XP image. I upgraded it to 3.0 this weekend, got a couple of missing driver errors upon boot (missing a PCI hub and video driver) and was unable to use my mouse in the Parallels window. Apparently there is a solution to this but it's only provided via PM? Not helpful in a public forum! I uninstalled and reinstalled my 2.5 version, but I'm now getting an incompatible drivers message there, too, and it won't launch. The PC partition is my professional workstation - this is a disaster for me.