A removable drive may or may not complicate issues. This is why... Poser5 is using Interlok (from a company called Pace) as it's anti-piracy/registration tool. When you register, Interlok writes a control block to disk (direct, not through the OS) it checks for this when P5 runs, (which is why the challenge and resonse are the same if you install, register, uninstall and then re-install. The only way to get rid of it, (as I understand it) is to do a low level format of the disk, or blank the MBR (the Master Boot Record, the place where the drive holds the table that tells it where the files are) which will accomplish the same thing. Now I'm not sure which drive Interlok writes to. Presumably the boot disk, as this is constant. But it could just as easily be the drive you install to, if different. I say this as CL has stated that you get 3 installs for free then you have to talk to them. Most people will only ever need one, as the boot disk will remain the same, so will the auth codes. But if you start swapping drives I guess you'll find out soon enough :) later jb