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 was wondering if it would be possible to take a USB drive and repartition it so it has multiple bootable images on it? So for example a bootable partition for installing Win7 32bit and another for ...