(I posted this in another thread and thought it should be restated in a new thread)

There is a way to play a modded server without losing rank. (I lost my rank in the process of learning how to do this so try not to kill the Old Guy while he rebuilds it back up)

1) Go to your player's profile folder containing the config_mp.cfg

2) Create a subfolder called "backup"

3) Copy the config_mp.cfg and mpdata files to that backup folder

4) You can now play on a modded server. After you are done, copy the two files in the backup folder back to the player's profile folder.

5) You can now return to a ranked server with no loss of rank.

Old Man Private Ranked Mike