Never mind, I lost the link, but found this:
http://wiki.osx86project.org/wiki/index.php/Vmware_how_to
This is a powerPc Emulator:
http://oreilly.com/windows/archive/PearPC.html
Also check out the comments at the bottom of the above page, they might be interesting. Example:
Forget about all of this, use Kalyway's MAC OS X Leopard boot disc. It supports most common PC hardware. On my typical HP Compaq CMT 530 desktop PC, it booted fine and then I chose the NetExtreme Gigabit network driver from the install packages and then it installed correctly on my second SATA drive. I have sound, network, mouse, keyboard, the only thing is my GeForce 6400 GS, but I think there is a KEXT I can download to fully adapt it. Anyhow, it works fine without the driver, only that it's stuck on 1024x768 resolution... which is still not bad.
I know, you can use google, but I thought I already did it, so I might as well share.
Good luck!
(PS: I have OSX 10.5 installation image (DMG) if you want - oh wait, had it... my HD is not working anymore. I might be able to reconstruct it from the DVDs... anyway if you need the installation image, let me know, I'll see what I can do.)