For another example of how to do this, you can check out CleanPath.

Note that strat's code in this thread will likely break %PATH% if you use it to change %PATH% (because it doesn't specify a "type" for the value which means a REG_SZ value will be set instead of a REG_EXPAND_SZ value which means you'll probably have unexpanded instances of %SystemRoot%). Luckilly, CleanPath will probably be able to fix it.

        - tye (but my friends call me "Tye")