There are a lot of things that you can do to increase performance before using an FPS config. There are tons of guides on the internet for better FPS including windows and regedit tweaks. A few things I would try are
-Defrag your hardrvie
-Run PCbooster
http://www.rainbowsoft.info/?p=2038
-Optimize windows
http://www.tweakguides.com/TGTC.html
btw, I never posted that config on that forum, no idea why people are alternating it when they re-post it.