1.download the Ubuntu iso from here:
2.burn it to a disk(its a small file so you wont need that big of a disc)
3.take out your computerís hard drive if you dont have your bios set to boot from disc
4.install ubuntu over your Mac os x so that there is nothing but Ubuntu on it
5.make sure you change your bios to boot from disc
6.run your boot disc and follow a tutorial to make sure your doing everything right! there is the iboot+multibeast tutorial here: tonymacx86 Blog: iBoot + MultiBeast: Install Mac OS X on any Intel-based PC and here How To Install Mac OS X Snow Leopard On a PC: Part One (How To Build a Hackintosh) - YouTube also the boot 132 is here Install Mac Leopard OS X Retail DVD on a Ordinary PC with Boot 132 hack. | Featured and I have found a bunch more so reply and i will try to give you one that helps