I think you should to make some changes to TXTSETUP.SIF and DOSNET.SIF from win2000 srt install image. I have little experience with this, I have just done installation on 30 w2k, 2k3 clients.. When your clients sends configuration to BMR server it also sends LAN drivers, RAID drivers, SCSI drivers.. YOu should to check TXTSETUP.BMR files created on BMR server and entries in TXTSETUP.SIF file and make necessary changes.
regards
marekk