FULLY functional install of Ubuntu 10.10 to USB stick in a WinXP enviroment

[Richard Owlett]

My eventual goal is moving from Windows to *nix.
Ubuntu was recommended to me by an acquaintance familiar with my 
goals and peculiar preferences.

I have one *ABSOLUTE* requirement for the process
   THE HARD DRIVE SHALL _NOT_ BE TOUCHED

Ubuntu can run on my hardware. I have a so called "LIVE" install 
running from both CD and USB stick. I also have an ISO file 
available.

I believe the buzzword for the type of install I'm looking for is 
"persistent". I've found instructions for doing so if I have 
already risked my hard drive by installing Ubuntu to it. Not 
worth the risk - no matter how many have done it ;/

Help please.