its possible as a said. some other programs wont quite work correctly tho since they run off the ie engine, and then otherstuff you download sometimes needs it too. so probably not the best thing to do. altho you can.
Firefox and most browsers ask if you want them to be default when you start them up. i'd just remove the links to IE. see how it goes. or... put an IE link on with the ie icon.. but link it to firefox. muhahha.
