At some point in the future I'll get round to writing comments for all the commands in my FPS config and post it up so people can tweak what kind of eye candy they want to have in TF2.

However in the mean time heres some great guides for tweaking your video card driver settings:

http://www.tweakguides.com/NVFORCE_1.html
http://www.tweakguides.com/ATICAT_1.html

Also for tweaking in-game this is a great guide:

http://www.tweakguides.com/HL2_1.html

Bear in mind that it was written for HL2, however since it's virtually the same engine 90+% of it is still relevent for TF2.

That's brilliant. I've a Radeon HD2400XT and was wondering if I could squeeze a bit more out of it.