Ok, got it right after I posted. I had this card in my old computer with APCI enabled, so I assumed it wasnt the cause in this case. I had disabled it in Lilo, but not in the cmos prior with no change. On a whim, I disabled it in CMOS and Lilo and BANG, booted right in.
Hope this all helps someone else. Is it worth upgrading to 1-5xxx drivers? Maybe in a day or so, maybe not. Just glad it's running after nearly a week of trying.