The Fumbi-ID
If you change this value to 0 and freeze it, you will drop the fumbi and regrab it immidialty. You can gain 200 Points in only a few seconds! But this will only work, if you are the master.
Also if you change this if you aren't the master, you won't loose Sp.
Sometimes you can enter YOUR ID and you will grab the fumbi. But be careful: This doesn't happen too often
The Lobby-ID Not included. Maybe next time.
You can get ANY ID of another player. Just rightclick at a player in the "Community" dialog.
The Master-ID
You can make nobody master. This is really useless, but funny:
Also you can make YOU master. So you can change the teams, which means: Nobody will earn any EXP or PEN from the time before. Remember: You have to set the adress to 0 to enter the room.
The Camera-ID Not included. Maybe next time.
By changing this Adress you can look at other players. In my example I was standing in the waiting room and just changed the "Kamera" value to the room-master's ID. But: If your watched player dies, you have to rechange the address, because it is set to 0. Or just freeze it.
The Team-ID (my favorite)
When you change this ID to 0 or 1 or 2 ... while you are already playing, you can change your weapon and skills. Really useful I think. And you can see the other's weapons xD
Also, if you change your ID without pressing the start button and THEN somebody makes a td, or the halftime loads, you will enter the game! But... you can't get killed

But, this only works, until you die or there is another td.