To operate chief's provided builds, all you need is the Post_Processing.tbl entries for the sunshafts appended as can be gotten in this thread.
Then either the stock built-in engine shaders, or if you are running the MediaVPs, the ones updated in the RC3 post (Which WERE just recently updated to resolve a mantis issue, so if you already got them when you got RC3, RE GET THEM) and add the sunshafts entry stuff to the Post_Processing.tbl in that package.
Nothing else will be needed, no other shaders (outside of the ones in the RC3 pack and then only with the MediaVPs) are needed.