OS X on Intel, (Careful noob attack!)

[wiplala69]

Hi folks. (Before you start responding: Yes, I'm a noob.)

I would like to install an OS X on my Intel PC.
I have an old computer (2002) with:
2.4Ghz Intel CPU sse2 compatible.
ATI 9600xt bravo 128Mb and
1Gb of RAM.

I have 2 hard-drives and I would like to grace one of them with a leopard or a tiger. Because I don't know how my computer holds up, I would like to know what to choose. Will the Leopard run smoothly?

I haven't found a nice little tutorial for that kind of installation. Also, do I have to change a lot of things in order to get it working normaly or does that only go for the partioned disks.

Thank you,
Martin.