Well, if you find a reskin, and find new stats, you can combine them to be a new weapon...
its broken
Heres a mod that I quickly made:www.dropshock.bduhq.com/FatmanF3.espIt reverts the damage back to the original damage in Fallout 3. I havn't tested it at all yet so tell me if you have any problems.
You can have mods for the steam version. The game has built-in addon support, just drop it in your Data folder and enable it in the main menu.
I'd also like to add that the steam version is the ONLY version of NV. Even if you buy the retail disk it'll be activated and played through steam.
didnt know that :o