Be sure to read the Hackintosh compatibility guide very carefully, to check whether or not your computer qualifies.
This guide is based off tonymacx86's method for installing Mountain Lion , except that we cover it with more detail (and pictures!). Right now, the newest iteration of OS X is 10.8, known as Mountain Lion. Installing Mountain Lion on a PC is pretty much the exact same as installing Mac OS X 10.7 (Lion). If you're interested in running Mac OS X, but you don't want to pay ridiculous prices for a normal Mac, then a Hackintosh just might be for you.