Got Mac OS X for x86 to run natively from a drive, with help from this handy guide. I did use an external hard drive, but none of the Pentiums in the house could boot from USB drives so I had to dismantle it and install it temporarily in my sister's computer.
Still using Windows, though, because
1) it's more legal
2) OSX86 crashes a lot and won't open some stuff
3) Windows is more practical overall (OH YEAH I WENT THERE)
If anyone wants to borrow my hard disk for a while they can. It's just sitting there with a 6GB OS X partition. If you've got a modern Pentium 4 (supporting SSE2) you can try it out.