The art of the Hackintosh (or, installing OSX on a vanilla PC) can either be simple (as in the case of something like a Dell Mini 9 netbook) or maddeningly frustrating (depending on EXACT hardware config - things like chipset, graphics adapter model/type, even Wifi card - i've run into a couple of cases where I had a laptop with a non-Broadcom wifi card that just wouldn't work, and due to hardware limitations swapping to a Broadcom card resulted in a card that couldn't be turned on)
In the end, there are pretty specific instructions for a few configs out there, in most cases you're on your own. What you want to do is read up on things at
www.insanelymac.com and if it's not too daunting, go ahead and give it a try.
In the case of the Dell Mini 9, it's literally simpler than installing Windows and took about an hour.
In other cases, i've spent literally months making things work, including one time where I had to basically hex edit a graphics kext (driver, sort of like a .ko file in Linux)