Server files are converted clientfiles. For example, the server does not need to load textures and sounds, because on a dedicated server, no one will look at the game. This leaves more power to handle the collisions of objects. Also, severfiles are converted for use on linux systems. This means all letters are lower case.
You can also mod server side files so for example on Charlie sector the axis could have KT's instead of hanomags and the allies could have yammamoto's instead of LCVPs. :naughty: (gah, for some reason I cant post with the old forum style. It says my post needs to be atleast 3 chars. long....)