Newbie install question

[jasenr]

I was hoping someone woud answer a stupid newbie question for me. I purchased all the parts from the recommended hardware articles and am not sure what disk image I should to install with. Do I just use my OSX 10.5 disk?

GA-P35-DS3P

256 MB PCI Express Gigabyte GeForce 8600GT (I think)

Q6600

4GB Corsair Dominator (2*2GB)

WD SATA HD

Sony DVD-+RW SATA

Thanks for any help you can give!