p5n-d Q6600...working lion osx but only with kalyway

hi, ive been studying a lot for about 2 months straight. ive actually put full working osx installs on a few other comps just playing around to see if it was possible, but my own is a problem!

Currently im working with 10.5.2 Kalyway, which runs fine, except for the net of course, which connects and lights up in the back but doesnt allow me to actually get online..
but my setup is the dreaded p5n-d, a supremely oc'd q6600, and a geforce gt520, with 4 gbs of ram, and dual booting with xp 64 bit.

now its great that i can get kaly to work, but then again YOU CANT UPGRADE KALY FOR SHIT! after 10.5.3 its a wrap! so i have been trying to get anything else to work on my comp but i get various crashes. Is there anyone else able to get anything else working if they have been or are working with a p5n-d with a q6600 or similar quad core cpu!?! and if you send me to a link just imagine that ive already been there!

so what i am really asking is there any way to either upgrade 10.5.2 to 10.5.6 or better???

or is there some method to this madness i havent tried yet?