I've got a 4 Gigabyte flash drive that I'd like to make bootable. For right now, I need it to boot DOS or DS linux. I'd like to have it boot to grub or something similar so I can select either one.

I have an old DOS program which has generated thousands of data files during its years of use. It offers printing only to COM and LPT ports. Is there any way of getting it to write to USB? It runs in ...