Make a new dir in your quake 3 folder called hh3.  Unzip ALL of these files into that hh3 folder you have just created.  Load up quake 3, and then go to the mod menu.  Select the mod titled HH3. When HH3 is loaded go to the multiplayer menu and create a new game.  Select your map, your bots, fraglimit, ect and enjoy.  Don't miss the new player models in the player menu if you downloaded the large hh-256 zip that contains new models/skins/maps.

-If you expierance slow downs in any levels with the rain effect please turn "marks on walls" off in the game options menu.

-If you want more help please go to this website http://tarot.telefragged.com/hh3/docs.shtml