My Promise Controller only has options of "Enable/Disable", and "RAID or IDE". I have no other options for the Promise in my BIOS.

I believe my ICH5R Southbridge has these other options you mentioned, but not the Promise Controller...
PS - I am using the PATA ports on the ICH5R southbridge for my optical drives (one on each IDE bus, both masters). I'm referring only to the Promise Controller's PATA port (the blue one on the mobo IIRC).
Any ideas? This is the 3rd place I have come for info on this issue, and it is looking like I either suck it up, or add a PATA HD (or 2) and make my RAID-0 array into a 0+1 array with 4x 300Gig HD's. I really don't want to do that, as I use my 2x 300Gig PATA HD's in removeable caddies for off-line backups (one off-site) and I really don't want 6 HD's in my case (I already have the 2x Raptors, and the 2x Maxtor 300Giggers in there).
Thaks for the reply, and any further info
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Asus P4C800-E Dlx (1024) / P4 3.2E @ 4.01GHz / 2Gig Corsair DDR550 (@502MHz) @ 2.5-3-3-6/2t Dual Channel / XP-120 HSF
HD's: 2x WD Raptor 36Gig in RAID-0 on ICH5R (OS) / 2x Maxtor 300Gig 16MB HD's on PROMISE (DATA)
2x Plextor 740A 16X D-L DVD-RW / ATI 9800Pro 128MB / Dell 2000FP 20.1" LCD / OCZ Powerstream 520 / RME Multiface 38 Ch Audio