Netware 5.1 can’t find SCSI adapter

I am trying to do a fresh install of Netware 5.1 on server with a LSILogic Ultra SCSI RAID Adapter. When I get to the point to install the drivers for the storage adapter, I choose ins to add a driver that is not listed. I then search the floppy drive for the mega4_xx.ham file. The search comes back with a blank line and says choose a driver to install. I can’t get past this point. Does anyone have a suggestion?