Linux Articles listed under "DOS on USB"
Creating a DOS Bootable USB Flash drive to "Boot DOS from USB", is not very complicated. However, a tool called Rufus, created by Pete Batard, can make this task simple. Rufus can also be used to create a Bootable USB version of a given distro from an ISO File. Rufus is similar in appearance and operation to the HP USB Format tool "HPUSBFW.exe", and shares many of the same features. However, Rufus is Open Source.
NOTE: This post was written in 2011. Rufus has since evolved into a tool that can be used to install many different distributions to USB.