The Radar2004 mutator has just been released at
http://www.bathotaxe.com/Games/.
It is a full featured UT2k4 radar, and works in all game modes, showing vehicles, bases, pickups, etc.
It is based on the Radar2003, TacticalDisplay, and TeamRadar mutators, and incorporates work by Pfhoenix, Cheshire Cat, Snorelax, and Airmoran.