No answers found. I already did the search before posting
Core 2 Duo will definitely work. The onboard network/sound on your board? That is going to be trial and error. You need to find out what they are, and you will most likely have to play with kext's.
I have a old e8400 at 3.8 ghz that has been on since it came out as a Hackintosh SL. Works fantastic with voodoosound. It is a Gigabyte board though and the kexts were easily available. It just doesn't seem to want to go past 10.6.6 SL though and that is fine. It is basically just a internet machine for everyone to use.
Check here.
http://wiki.osx86project.org/wiki/index.php/Main_Page
It might be that you can run snow leopard, but maybe not past that. You might get stuck on a patch of snow leopard. You will have to redo kext etc after each one. You can download each individual patch under Snow Leopard at the apple store. You may have to stop at a certain one.
10.6.6 should be the goal for a duo core I would say. You get app store and the stability is fine. Everything past that has been fluff anyways, and on a slower duo core, you don't want that slowing ya down.
Get bettertouchtools (free for snapping to a large window ala windows 7) and use chrome and you have everything except the silly launchpad that I never use on ML anyways. I am sure some people like Safari but I don't. That is about the only thing you are missing out on (the new one). That and the horrible fullscreen that you can already do in chrome/SL entering presentation mode.
Also the HD needs to be AHCI in the bios. You CAN get Snow Leopard to work sometimes without it, but it isn't always easy. If you can't change to AHCI in the bios, you are often screwed.
enabling sleep? That might never work. It being a nice Snow Leopard internet, imovie machine. Possible.