Icrontic has just published a quick and easy guide to making bootable USB flash drives. The uses are endless, from having an arcade on the go, to helping diagnose computer problems.
"People often inquire how to make a flash drive bootable. There are many tutorials out there, some to greater success than others, but Icrontic is here to give you the definitive answer. All that's required are two programs, and an arsenal of floppy images that you'll want to put on the flash drive. When all is said and done, you'll be able to boot into a spiffy menu that will give you the option to launch any one of the utilities you have selected with the touch of a button. Best of all, your USB key will still be usable in Windows, Linux, or anywhere else you desire."