bootable usb

Hello, I was wondering if there are bootable flash thumb drives, would flash memory card be a good idea? I guess for main OS it won't due to constant writing of data but how about to use Live CD stuff on them like Windows, Linux for troubleshooting and repair purposes? I heard how not using...

Im trying to create a bootable usb to use on my computer. Im working off a macbook pro and can't find anyway to make the usb bootable on my pc. Ive recently purchased a windows 7 pro key and downloaded an iso for it. Ive tried downloading the windows 7 usb tool, refus and some other...