Ok for starters this is in violation (I believe of Apple's) terms of service at the very least, and possibly illegal?? I am not 100% sure about illegal but I think I would avoid installing this for a client. For one thing it isn't as stable as an apple install (at least that used to be the case), and some features were disabled. if you were doing it for yourself I would play with it. http://www.hackintosh.com/
is one of many sites with instructions on how to do this.
It isn't as easy as you may hope, it will require a boot loader and some duct tape to work.
I would stay away from this request with a 10 foot pole as it will bite you in the end FAST!..