I basically created a package for work that had (I think) the best essential features. I will eventually create another one that is very similar but has one more extension to make it more secure. That one I will post in my downloads section. Here is the one that I created for work:
http://www2.montana.edu/desktop/Firefox.htm

I'll post again when I get my security package done. If your interested in the install scripts, post a response & I can make them available.