This is more or less the "Baker Update", since I'm mainly adding links to things created by "Baker" (a Quake engine coder).
http://steamcommunity.com/sharedfiles/filedetails/?id=118401000 I added more description about using some of the available installers for ezQuake and DarkPlaces. More interestingly though, I also added links to a couple of installers that Baker put together for QuakeSpasm and ProQuake. These installers will automatically set up those engines to use the data files from your Steam copy of Quake.
http://steamcommunity.com/sharedfiles/filedetails/?id=123626484 I changed the "Alternatives" section near the end to include a description of Baker's modification of FBCA (Frogbot Clan Arena) for NetQuake. FBCA is a much-improved version of the original Frogbot that plays better and supports hundreds of maps. I thought that FBCA was only available for QuakeWorld engines these days, but Baker's version is for NetQuake -- so if you like to play using NetQuake engines like DarkPlaces, QuakeSpasm, DirectQ, etc. then this is worth checking out as an alternative to FBX++ or Omicron bots.