Ok, I just got my 1gig thumb drive. To save space I want to zip up the files I put on it, but I want to be able to unzip them on any Windows computer, even one that is not XP or has a program like WinZip on it. Is there a good zip tool that is stand alone and does not need to be installed? I want it to be small so it takes up little space on the thumb drive. Suggestions?