Hmmm... not sure I follow. (no surprise, I often don't.) What my idea was is to have Win 2000 on my swappable drive with Poser 5 and related files and apps on it. The drive that would swap in it's place would also have Win 2000 and my regular working files and common applications on it. If Poser5 pulls some kind of a stunt and messes up the OS, I would pull the drive and swap in the other one and carry on and backburner P5 until issues are resolved and I can get the pulled drive reformatted again. I could easily be missing something here, and it is quite possible that my logic is flawed, but that was my intent.