Arcserve 11.5 ASR

I am trying to setup my companies Disaster Recovery procedure. I have backed up a gx620 as a windows 2003 server. I have now broke it and I am trying to restore using the ASR function in 2003 server…However I keep having problems with the DOS drivers for a GX620. I have made numerous ammendments to the ASR.SIF file but I am unable to get this to work with the dos network drivers. Can anyone help??