MultiBoot USB
This is a project that contains a collection of GRUB files and scripts that will allow you to create a pendrive capable of booting different ISO files.
In this boot CD are the most popular and useful tools anyone would ever need. The best of the free software, the best of the commercial software, and it all fits on one CD-R that’s readable by any computer worth booting on. Not everything can read a DVD, and USB booting is hit and miss at best.