If you want to reinstall Windows, or change something on your Computer System that requires you to reinstall Enemy Territory, it is important that you save your GUID.
The GUID is stored in a file, and that file is called "etkey". That file is located in your \etmain\ folder within your Enemy Territory installation directory. Well, easiest way to save is to zip it, save it to a location you can get to after you reinstalled your system. Now, when you need to reeinstall that file, all you need is to reinstall ET, install all patches and then copy the saved "etkey" file back to the ET installation into the \etmain\ directory. That way, if you keep the saved etkey forever, you should be abled to save your XP and the userlevels. I hope this advice be useful.
Aragorn
