RE: post 63 - BadCo >One other thing, if I upgrade to Poser6, then if I sell my >Poser5 to John, then John will not be able to register the >Poser5 that I sold him ? Then if John wants to upgrade to >Poser6 then he can't do that either ? Right. Once a serial is used to upgrade, it is no longer valid for upgrade. And based on what CL has said on this, probably not for registration of P5, since you used it to upgrade! CL can't have a single serial used to upgrade multiple times.