Ouch, going to have to repeat grammar school on this one, the drive label documented CS, MA, & SL. Gave up & was about to pop in a 120 GB WD I just had lying around (what a treat when I opened it, it was supposed to be a 2mb buffer, but found a red note that said they gave me a 8mb buffer HD instead).
Anyway, the jumper setting wasn't listed on the label for "only drive on cable" but the install help card for the retail drive I had did, moved the jumper, & it naturally started booting from HD... DOH
Thanks for the help though