Microbyte PC-230

Hi, I've started playing around with this old XT/AT compatible machine I've had for a while, called the Microbyte PC-230. It's designed locally in South Australia. My question regards the OS installation. A thoughtful person has uploaded the installation disks to driverguide.com but they're not images, but ZIP files of the contents of the install disks. It seems the install program checks the disk label or something similar to see if the correct disk is in the drive. I don't know the disk label or anything else about the original disks so I can't install the OS on the hard drive. The original hard drive is a 20MB Miniscribe which has developed bad sectors, so I've installed a 511MB DEC badged hard drive. The system has the odd feature of having on-board SCSI. It's an 8086 (NEC V30). I've had a poke through (or peek as it were) the INSTALL.EXE file on disk 1. There are a heap of null-terminated strings towards the end of it. Just after the message which says to insert disk 1 it has the string "\MBSCO1". I can only assume this is the disk label, but setting the disk for that doesn't let the program continue. Even setting the disk with a backslash in Linux doesn't help. After the second insert disk message there's a "\MBSCO2" string too. Perhaps I'm missing something. Any thoughts? Alexis.