Well, that was frustrating. Pulled both cards and booted to the 10.2.6 volume without any problems. Decided to put in just the P6000 card to see if that is the one providing problems, and booted right up again to 10.2.6 without any problems. Yay! Figured I was in the clear! I launched Media 100i (v. 8.1) and all was well. So, like a dummy I started looking at some of the other stuff on the hard drive and found the Media100i installer file, so I thought, hey, why not just do a clean install on my Tiger volume? Rebooted and installed on Tiger, looked good (didn't ask for a system key during install which I wondered about) and said the computer needed to do a restart to finish. Voila, rebooted to a kernel panic. Removed the card, rebooted, same thing. Kernel panic. Won't boot the 10.2.6 drive either, even without any of the cards. So, I don't know what's going on. I was able to boot to a utility CD. Pulled all the hard drives, shut everything down, and stewed for the rest of the night. I have a different hard drive I'm going to install later today with Panther just to see if it will boot. Wondering if the P6000 card kicked off something that fried some of my RAM. It made a weird cranking noise after rebooting after the install and when I removed the card it was HOT, like really hot.