css guru

As some of you know/don't know, we terminated our designer and are struggling through project until we can find a top quality replacement. That being said, I have a 3 css file for a just completed project I would like to have reviewed. Everything loads properly, I want to insure the files are properly coded and optimized for efficient load time in IE. The files are attached. Would like to have this completed today. They may need nothing or may need restructuring. Leave that to you guru's