Need Help: Install Diablo Twice Or Clean It

I need to install d2x a second time (for a clean version) but how ???
or just something that totally cleans it so its like reinstalled....
dont tell me to unistall-reinstall CUZ I CANT (more then 1Gb, modding shared files etc, just cant do that)

i really need sum help here, thxxx all

no1 ??? really no1 knows how to install it twice ???? :'(

Copy all the files into a different folder.

I think it would notice D2 entries in the Registry, and not allow a reinstall...

One nifty thing you could use, is C3PO. It's a D2hackit/Maphack type of deal, that has a loader option to load with/without R2D2 loaded. Very cool. The only downside to it, is that you can't use any D2Loader plugins while using it.

u can load plugins actually, just unload it, load plugin, reload c3po (well that seems to work with me)

but i dont understand how this helps me... i need a clean d2 installed and this one is messed up, so just running without hax or sumting is not a solution, its "in the files"