How to change back my resultion?

I just installed left for dead, however it has gone to 1280x800 - or some resolution/refresh rate my monitor doesn't support.



My problem is that i cant get into the game to change it.



Any one know how?



I tried going into the config files but i couldnt find anywhere that says the reolution =[



Any help appreciated.



KiowHow to change back my resultion?
Yeah, so your problem simply is yourself.