The El Niño Quake Extensions page has version 1.4.0 of the Viz mod for Quake III Arena. The new release of this mod from the author of the visible weapons mod for Quake II adds player class characteristics to Q3A based on the model you select, as well as gameplay options like bleeding from wounds. All options can be toggled on and off, and included is a .cfg to make the game "action quake-ish game, with one weapon per player, forced player models, and no powerups or armor." The whole deal is explained in the FAQ.