The first thing that you have to take into consideration is whether or not your internet can support alot of bandwith or rates for more on rates go here:
http://www.theelders.net/forum/index.php?topic=3949.0Because of this i will put up 2 seperate configs the first will be with the rates that you should have the second will let you set ur rates freely.
Copy the following post into notepad eactly as it is.
Saving your Config
Go to File.
Save As.
Change so Save as type: All Files.
Under save in go to:
My computer.
C:
Program Files
Valve (if valve is not there go to steam)
Steam
SteamApps
Your Account Name.
team fortress 2.
tf.
cfg.
Name it autoexec.cfg
Click Save.