# gunzip <balder10.imz >balder10.img
# mount -o loop balder10.img /mnt/test
# umount /mnt/test # gzip <balder10.img >balder10.imz
# qemu -fda balder10.img
GRML older than 1.1 does not provide enough space on the FreeDOS image to just copy the bios files over there.
You need to create a 2880 superfloppy based FreeDOS image. Use this to create a superfloppy based FreeDOS image and use the description above if you need help to install the bios files onto the new image.
# gunzip <balder10.imz >balder10.img
# dd if=/dev/zero of=big.img bs=1024 count=2880
# qemu -fda balder10.img -fdb big.img > format b: > sys b: > xcopy /E /N a: b:
If everything else does not work, your last resort is a stand alone FreeDos, either on a floppy or on usb.
If your bios files are >1.2MB you should choose the usb ;).
# qemu -boot a -fda balder10.img -hda /dev/external