UNetbootin will make a bootable liveUSB drive

UNetbootin allows for the installation of various Linux/BSD distributions to a partition or USB drive, so it's no different from a standard install, only it doesn't need a CD. It can create a dual-boot install, or replace the existing OS entirely.

UNetbootin has built-in support for many distributions. It works with Linux and Windows. Check it out for yourself:

http://unetbootin.sourceforge.net/