Go here and follow instructions
http://home.comcast.net/~n.siakotos/index.html
All you have to do is run a server first steam won't create the file untill you run the server just double click on dedicated server under your my games list wile running steam, let the server start up and run then exit out go back in to the folder and it should be there if you want you can use my full pack located at my site for easy install process