Hey i have been reading many topics and threads about the P35 chipset and how osx works with it

. I was due in for an upgrade so i decided to buy the Asus P5KC motherboard, it has the P35 chipset, ALC883 audio.. attisnic gigabit lan (have a spare RTL8139 lying around) and yeah.
I have used my Uphuck and Jas dvd images for my other installation, but neither like my new computer

. What happens is i insert either the Uphuck 1.3 OSX 10.4.9 dvd or JaS 10.4.8 and boot it with -v, and it will first load the USB.. then it will say caused wake event, then it will load firewire.. then it hangd and prints wiaiting for root device. So i disabled my firewire on my motherboard, and boom it worked only this time freezing @ the USB. so i disabled USB2.0 and then it started working. Now thing is i need USB 2.0 so is there anyway around it? btw i have the 0705 bios revision, ROM Modded 7950GT 512mb and 3gb ram.
If i boot it without USB 2.0 it gets to the installer and everything loads. I read that for P35 chipsets and Sata drives, u must set the sata drives to ahci for osx to be able to see them. i searched through the bios many times but never found out how to do this. Could someone please explain to me how ? or is there an easier way for P35 chipsets that im not realising

?
i would love to hax osx running, as it never quite worked on my amd 4200+.
Regards,
jeremy