Personally I can accept copy protection for software to stop illegal use but:
I expect whatever copy protection to be such that I can fully install and use the product for a limited period of time or register it online through internet no matter what time it is so that when I get a copy I can start using it immediately and don't have to start to install it and then wait for normal office hours until I can continue. If I reinstall my system I tend to do that outside normal office hours when I have the time to do so. For VirtualPRC this is made even worse by the fact that when I need to move to a different hardware or do hardware changes that I need to go through this procedure again. I do have the odd product with copy protection but for all these they are either such that one registration is enough for ever (that is the registration data can be re-used after re-installation) or I can re-register them through internet online any time or that they run for some 30 days giving me enough time to reregister them through other paths.
Thus: That VirtualRPC has a copy protection is absolutely fine but the way to get it unlocked is something I can't accept. There are quicker ways possible these days.