I didn't clarify, but my original problem was importing multiple Mozilla profiles. When running Firefox for the 1st time, it only gives you the option of importing one.
What I did was run the profilemanager by adding "-profilemanage" to the shortcut. I renamed the profile I had already imported because Firefox simply called it 'default'. I then created a new profile and opened that. Then I went to File -> Import and imported my other Mozilla profile. Had to tweak the bookmarks folders a bit, but it worked just fine.
I'm going to wait until Thunderbird comes out with a 1.0 release before I switch e-mail clients and use Firefox as my default browser. So far, I've been very happy with it. The FoxyTunes extenstion is really nice.
Cthulhu