Help whit installation on Gigabyte

[universeforce]

Ok this my problem. My mobo it's a gigabyte GA-MA785GT-UD3H, Phenom II x4 995BE and when I insert the Hazard DVD MAC 10.6.3 Server just appear "still waiting for root device" I booted whit the flag -v busratio=20. The thing here is when I set the HDD to AHCI and the port 5 in IDE mode (DVD) I get the the "still ...... leyend" but when I set the HDD in Native IDE mode the distro recognize my HDD...... and I can start whit the installation, but on the disk utility can't see my HDD!!!!!

When I set all the devices to AHCI mode I just can't boot from the DVD, because the mobo do not recognize the DVD-RW as bootable whit any CD or DVD inside.

Somes sugestions please??????