The aq2000_55setup.exe file you have requested: Tools and Utilities / Utilities / AutoQuake 2000 v5.5 - 1.21mb is not available. Perhaps try browsing all files for the game Quake III Arena and upload any files you want to share or are missing. This is the only information we could locate:
You can easily start mods which are based on Id Softwares Quake engine. This program is big help for those of you who haven't updated Half-Life, Quake1 or Quake2 and want play Single Player mods like They Hunger and Darkstar or even some old Quake 1 mod.