I installed my CB the way tcp/ip did his ham radio. The first link is to his web page with some very good instructions for getting the dash apart (with pictures) on a 2002 and newer. I ran the antenna wire to the back, tucked under the interior molding, and through one of the tail light grommets then up to the roof. The antenna setup on the roof looks like the setup Kerensky97 did. (second link). I like the way it turned out.

http://www.megagate.com/~n5mz/
http://xterra101.com/antenna1.htm