snow leopard upgrade

HI Guys. Sorry about my english, but i have another mother language. I´m new in hackintoshing, but could made a successfully retail installation of Snow Leopard on a Gigabyte GA-G31M-ES2L, bios FG, with 4Gb ram, 2 dvds and 3 hds installed (all IDE ports used). I have a Nvidia GEForce GTS250...

I built my system (with help from several people on this site) a couple of years ago. Of course, the week after I bought Snow Leopard from Apple, they put out a new OS & I decided at that time it was going to be a LONG time before I would update/upgrade my version of OSX so I couldn't get...