Check out the attached zip file and extract it in your
C:\Program Files (x86) \Steam\steamapps\<username>\team fortress 2\tf\cfg
Then, edit your tf2 launch options with the following:
-noforcemaccel -noforcemparms -noforcemspd +cl_showfps 1 -novid -noipx -nojoy -nosync -nocrashdialog -w 1280 -h 800 -full -dxlevel 81 +exec arc.cfg
You can modify your resolution in the launch options -w and -h (currently it's set to 1280x800 which is a pro approved resolution).
Also, you can change from -full to -windowed if you want window mode instead of fullscreen. I prefer windowed mode but it isn't pro-approved.
Next, load TF2 and close it.
Then, remove the "-dxlevel 81" from the launch options. This is important when enabling directx 8.1. Otherwise, your video settings will be reset each time you load tf2.
Thanks to arcturus for the pro config. Let me know if you have any problems installing.
arc.zip 2.26KB 83 downloads