Unfortunately, I know next to squat about modeling/rigging/texturing. The best I can offer is to check out some tutorials, and perhaps broaden the scope to include Oblivion if you can't find anything to get general help. Just a quick search led me to this:
http://www.fallout3nexus.com/articles/article.php?id=196
Not sure if it will help at all, but like I said, I'm clueless in this department as I never tried it. Hopefully someone else will be able to help you more thoroughly, or point you in a better direction. Good luck!