Hi,
Vanguard: I suspect that if you activate multiple copies of XP with the same Serial # under VPC, that actually, you'll be fine. Here's why.
My understanding of XP activation is that it links a Serial # to a hardware profile of your system. The most significant advantage this has is that it effectively prevents you from installing XP on mulitple systems, because generally, different systems have different hardware profiles. Someone, correct me if I'm wrong.
Now, under VPC, your hardware profile is basically the same -- at least, as long as you are installing VPCs under similar hardware (not sure if VPC on PB G4 gives you the same hardware profile as it does under Desktop G4 or iBook, though I strongly suspect it does). That means I think that if you have an XP image, you can just share it among many VPCs.
Now, if on the other hand you wanted to share an XP image or activation code on an Intel box as a true install, and on VPC/mac, you likely will *NOT* be able to do that, for as vanguard said, the activation code would 'deactivate' the original install on other hardware, or would not install on the second hardware at all.
Someone please correct me if I am wrong.
-ZeroAltitude