Win 2000 booting on D: scsi disks

I have four 2 gig scusi hard drives in my system. I have it arranged so that I can boot from either of two by using Adaptec’s cntl-A.

They are all ntfs, three basic one dynamic. But my problem seems that the system will not see a c: drive. It will boot on the first drive and read it as d:
I need the drives to be in c:, d:, e: order because of linked programs.
If I boot off the other drive all drive letters are from c: to G: as they should be with the zip and the cdrom at the end (I adjusted the removeable like that). My question is… how can I get the d: to be seen as c:( I have adjusted all drive letters except the d:)..that one does not change… any suggestions?
Thanks.