These are the Quake 3 Arena / Quake 3 Team Arena Default media kits in ZIP and 7z form. These are the base game map, icon, role and weapon sets.
For those of you who are wondering where the Excessive Plus went. Sorry "XP" doesn't ship with any maps. Excessive Plus is a MOD for Quake 3 Arena / Team Arena and it just modifies games play. There are custom maps for the mod, but until they make a "map set" for their custom maps, there isn't one in existence. It just uses the default map sets for the game.