NOTE: You should use a spare computer for this (one that you don't really care about)
Just plug it into a computer, and then restart the computer with the CD in and when it asks you what disk you want to up it on, simply choose the the flash drive. NOTE! i have not tested this (im pretty much just guessing)
couldn't tell you on a mac, I assume they have a bios like pcs (guess I'm showing just how lacking I am in mac talk) and if its a decently new computer you should be able to boot to a usb device. Just go look at your boot order and make it boot to the usb.