Welcome to the world of the Macintosh. The Mac OS (OS X) is not yet designed to run natively on a pc. To go so would be dishonest and a violation of Apple's SLA's. You really need to get a Macintosh computer that has the correct startup roms and such. Maybe those roms are available in software somewhere. What version of the Mac OS are you trying to install - 10.3, 10.4, 10.5 or 10.6? That also makes a difference. And a hacked version will never give you the performance/experience of the Mac OS imho. Be honest and jkust buy a Mac.
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Latest addition 2010 Mac Mini server