I have P4 2.66GHz processor with D101 Intel motherboard, 1GB DDR RAM, and 160GB HDD.
Follow-up on Richards post: it's illegal in any and all cases
SOFTWARE LICENSE AGREEMENT FOR MAC OS X
Single Use, Family Pack and Leopard Upgrade Licenses for use on Apple-branded Systems
2. Permitted License Uses and Restrictions.
I. You may not and you agree not to, or to enable others to, copy (except as expressly permitted by this License), decompile, reverse engineer, disassemble,
attempt to derive the source code of, decrypt, modify, or create derivative works of the Apple Software or any services provided by the Apple Software...
Anyways, the best sources for this are:
There you might get an answer as to where to start your "project".
I'm calling it project on purpose because there is way more to it than a bootloader and EFI emulation (to mention one: Chameleon).
Even with those "ready to use" DVD distros like (iATKOS, iDeneb, iPC, JaS) you will end up installing it several times until you find a somewhat working combination of patches, driver and kernel.
Again, somewhat is on purpose because sometimes there is one little thing that makes your installation unsatisfying.
For me and my Dell Mini 10v using the NetbookInstaller I had to find out that the Wireless-N card I upgraded too wasn't supported, no driver to be found and the display resolution wasn't enough to display dialogs and windows in whole (e.g. System Preferences) ~ very annoying.
There are a few special case, there always are with Apple
You could also try running it on a virtual machine. Here is a link with a tutorial about how to install leopard on virtual box:
The trick to run an apple operating system on a PC is to try and build/get a PC with similar specifications as Mac.
This is also illegal, unless specifically licensed by Apple.
OS X can be installed on a P4 (most Intels for that matter with a patched kernel), but it is unethical and illegal in most cases.
the following doesn't answer your question as it doesn't address whether it can be done on your hardware, however, Jorge has written an article on How to Install Mac OS X on a PC (Without Using a Mac).