USB booting :: Install to a PenDrive?
Make sure that you burn the iso as an image.
In Nero, choose File -> Burn Image (Nero 5) or Recorder -> Burn Image (Nero 6) from the menu.
This will cover how to install it nicely.
http://fuzzymunchkin.dyndns.org/tdot/usbkeyfob/index.php
original here.