Do you have other options to choose from in the "D:\images\" folder? The problem might be that the cdrom.img you chose just doesn't have support for your scsi controller. I've never installed Mandrake - but on my last install of Slackware, I had to choose a boot image that supported the adaptec scsi controller. Look in that directory and see what the other .img options are. It looks like there might be a "D:\images\alternatives" dir from what I can tell from older Mandrake documentation.

- trs