As of now you are required to use the anticheat.ddl and one of the supported clients (R1Q2, EGL, AprQ2 and Q2PRO).
You can download all required files at: http://antiche.at/
This action has been taken to provide more security for the kots2007 players, a very cheat sensitive mod.
Also many people have been using hacks and cheats on our jump server, so I chose to enforce the anti cheat module there as well.
Due to many false times on our jump server (eg: I found a n00k!e from 6 different countries) it is very likely we will be doing a reset on the jump server to start fresh, without the cheating.
Before we do that we are currently working on a list of code changes for the mod and gave probably found a person willing to do them for us.
Once in place the reset will be done.
Good luck and cya out there!