I get an error saying it was not able to mount the drive or somethin along those lines.
Is /dev/hdc your cdrom drive? The only part you were vague about is the part that mentions what the problem is! What type of file-system is the .img file? Being a driver disk, it may not need to be bootable, and you may have luck if you A) mount the .img file as a loopback device, and then burn the files onto a cdrom. However you will want to read the installaton script you mentioned to see if a floppy is assumed. If this is a Promise controller, I think the script copies a directory to / (on the ramdisk at this point) and runs an insmod command. Perhaps you could perform the same steps manually, except your copy command will be from cdrom.