You can use DOS to flood the server
Edit: If you want it here is the link
http://rs221.rapidshare.com/files/127319549/DOS.rar
Virus Scan:
http://www.virustotal.com/pt/analisi...5f8-1250644231
I use it, so I wouldnt worry, and by the way its 5/40
Up to you
If you gonna use it: First of all, make sure you have the server IP. Then unrar it, make a shortcut anywhere, open the properties of the SHORTCUT.
In the Target box you paste the server IP, apply and close that.
Execute the shortcut and voila
BY THE WAY
It wont do $%#* to anything but non-steam servers
Have fun