I installed the CS before the game and already made a few tweaks
Unfortunately, we can't create new weapon models at this time because there is no .nif exporter due to some legal issues between Bethesda and some 3rd parties (Havok is one of them). It seems that they discussing the issue so we can still hope. However, new skins are possible. You need tes4bsa to unpack bsa files and extract texture files: http://www.elderscrolls.com/forums/i...owtopic=277237
There's a photoshop plug-in for .dds files. To make new items with new stats and effect, it's more or less like KotOR but easier. Select an existing similar item, change the entries and save it under a new name.