Indeed, the mode used to be a part of my mod, but during a rewrite of the mod, I didn't port the VIP mode across (it hadn't seen any use in about a year by that point, saw no reason to keep maintaining it).
If there is interest in it though, perhaps it can be brought back...
VIP is a bit like keep away with teams; Each team has a "VIP" (Very Important Player) with CA-style extra health and armour. When a team's VIP dies, the round ends and a new VIP is picked.
Winning team is of course the one with the least VIP deaths.