This is an old addon pack that was preserved by Bradless (Zeth), for some reason I cannot yet grasp. But it is available to players if they would like to play with an addon pack designed for Public Beta 1 (SVN Revision 859) of ZEQ2-Lite. Usually, the senior members would be the ones to play PB1 because of their memories of the game, and because they prefer the gameplay in PB1 rather than that of SVN Revision 1536. However, I'm not sure whether senior members would use lots of addons (if any), but I know there are some players who would like to try PB1 and will rejoice once they have set their eyes on on of the few PB1 addon packs. The downside to this is the fact that there is no server browser, so you'd have to type in another player's IP manually. Unfortunately, the Master Server Fix available to Revision 1536 users will not work with Revision 859, so tough luck if you can't figure out how to type in an IP with an interface as simple as it is.
Continue browsing the mod list, to find the profile you are after.