Hi everyone!
First of all, I'm new to InfiniteMac and I don't know wether some of you already discussed this problem, but when I did a search, I did not find anything for P5K-SE.
As you can see in the thread name, I get a "still waiting for root device" error when booting SL 10.6.0 with empire Efi. I tried several derivats of EmpireEfi, but I always failed booting. I also played around with the BIOS settings and even plugged my SATA hdds to other ports. I just tried to use Empire EFI because my BOOT-DFE-146, which I hardly builded for my board on my own (what took several months), did work for Leopard but doesn't for SL.

Here's some information about my (for OSX a little awkward) system:

ASUS P5K-SE
Core2Quad Q6600
2 GB RAM
IDE DVD-ROM
2 SATA HDDs
ATI Radeon HD4850