The emulation method is much slower than the method using InsanelyMac above. PearPC is a tool which will allow you to run OS X in an x86 environment, without putting in any effort.
If you have an older OS X Install DVD ( 2004 and older) that uses a PowerPC architecture, you can emulate PowerPC's architecture using PearPC.If you have a recent OS X Install DVD ( 2005 and newer) that uses an x86 architecture, you can install OS X directly on your computer using InsanelyMac, which will circumvent the hardware detection used by the OS X install disc.Since Linux is fully customizable you can use this guide to make it look like OS X. Since installing OS X on a PC is illegal, you could also try installing Linux ( Ubuntu Linux is the most popular Linux out there) on your PC.Then go to and download all the Window’s themes you want. It lets you access Windows XP's built in skinner. For the simplest way, install this patch.If you want to bootscreen, sound scheme and whatever, you should try Flyakite OS X.If you have enough money, an easier way would always be just to buy your own Mac, of course.RocketDock is updated more often, and has more themes to choose from. If RKLauncher doesn’t work well, an alternative to try is RocketDock.
You can also download some Mac OS software like iTunes, Quick Time player, iMovie, iCal, Address book, Mac Clock, volume control and Mac Games.