Appreciate the help offers. Tried about a dozen tools, all (most) are supposed to make the USB drive bootable. The machine makes an attempt but in 9/10 cases I end up with a black screen and a blinking prompt. One attempt got me as far as notification there was a file problem.
Next up: make an actual UBCD with one of those shiny round things. I must have a box somewhere. I'll get there in the end.
Making a bootable USB stick is one of the easiest tasks under Linux.
- download grml image
- plug in the USB stick
- check the syslog, which /dev/sd... the USB stick is (something like /dev/sdc /dev/sdd)
- as user root: dd if=<image_file_name.img> of=/dev/sd... bs=512 <ENTER>
- wait for finishing
- boot grml from USB stick
This procedure works as well for a bootable windows image. This can be created easily as well:
- pick up a bootable windows CD/DVD
- insert the disc in a drive (assuming this is /dev/sde)
- under root do the following: dd if=/dev/sde of=windows_boot_image.img
- wait, until it's finished
- create a USB stick with the steps mentioned above