Some error

So, I tried messing around(downloading) Foreman's texture hacks and what not.. Using war3z screenshot tutorial, blah just replaced iw.00 with 07 like Foreman has it. Did all the steps correctly and now when I try to load mw2 it says "Couldn't load fileSysCheck.cfg. Make sure Modern Warfare2 is run from the correct folder."
Do I need to reinstall it or whats up?