Sorry about the formatting, its too early and my coffee hasnt kicked in :)
No prob.
Wrong a PC can run anything a MAC can run, including OSX and run old PPC based Kernel OS's from Apple in virtuality, the only difference being is that the PC has to trick apple OS to get past the Apple ROM check.
My understanding is that there are some significant hardware incompatibilities - and unfortunately, it is also software piracy - although Apple hasn't had anyone prosecuted for it yet. I would advise against trying to run Mac OS X on a PC.
The past pricing for a major new Mac OS release has been $129 SRP for a single license - or $199 SRP for the five-license family pack. You can get a good discount at places like Amazon.com. Then Apple distributes free updates to that version for at least a couple of years. And it doesn't have any onerous registration procedures like Vista, and it won't nag you about not being a "genuine product" - as has happened to millions of legit Windows users.