How do you boot from IDE3 RAID

I have just installed a new HD on IDE3, no issues getting the bios to recognize it. However if there is a bootable HD in IDE1 it will boot from there and not from IDE3, regardless of what I do. I have tried in the BIOS disabling all boot devices and to boot from HDD-0/3, but it always boots from IDE1.
I think this is a BIOS glitch as there sould be a boot from RAID controller option.

First, the system details:
K7N2G-ILSR, BIOS rev. 1.3
BIOS/video caching options left disabled,
after finding out the HARD way
2 x Mushkin PC3200 256K DDR (Promo Dual Pack)
6-2-2-2.0, 2.7V (as sugg. by Mushkin)
AMD Athlon 900MHz non-XP (100MHz FSB)
No overclocking yet
IDE1 master: Maxtor 20GB ATA66
IDE1 slave : Maxtor 34GB ATA66
IDE2 master: Plextor DVD+RW
IDE2 slave : Plextor CD-RW (later, with longer cable)
IDE3 single: WD 120GB ATA100
Intel Winmodem, PCI slot 1
Leadtek TV2000 XP Deluxe tuner, PCI slot 5
Koolance Exos water-cooling system, cooling CPU, chipset/video, and WD HDD.
This is an upgrade of an aging GigaByte system. I had Windows 2000 installed on the 20GB drive, and VERY heavily customized. What I wanted to do was set up the WD drive as a RAID array (with eventual plans to buy another drive and mirror it), and then use PartitionMagic to copy/move the original partition from the 20GB drive to the new WD drive, and then remove or reformat the old drives as "archive" drives. I desperately need to carry over the original Windows 2000 and installed software, or I face literally months of trying to reinvent all the customizations (and some maybe never: I've forgotten how to get rid of the stupid "assistant" in Outlook 98).
The problem: Windows 2000 is now seeing the WD drive as physical disk 3, which will f**k up the boot loader in the copied partition, which expects to be on the first partition of the first physical disk.
In the meantime, I've been forced to do a new Win2K install to the WD drive (seen as E:), with the original install on the 20GB drive (still seen as C:) so that I can reach the 'Net and things like this forum. :-/
The original install shows up in the boot loader now as an option, but of course isn't bootable with the MSI board yet because all the old GigaByte drivers etc. are still being used. I can fix that eventually, but then there's this problem with the physical ordering of the disks.
I can't simply move the WD drive to IDE1 and move the original bootable disk elsewhere, because then the original won't be bootable (different physical disk), and I wouldn't be able to later create a mirrored array with the WD drive.
I need to have the motherboard/BIOS report the RAID array as physical drive "zero"; is there a way I can make that happen, or is there another way to do what I want that I'm not seeing?
Mark

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easybpw wrote:
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