Use the ucc engine to compress.. maps, testures, sounds, meshes, etc. NO NEED TO COMPRESS YOUR SYSTEM FILES. There is also no need to rename the files after compression, ucc.exe takes are of that for you.
Put all the compressed files into one single directory. Put the url where those files are into your SERVERS ut2004.ini - and viola, when the clients connect - if they don't have a particular file, they will get it in compressed format from the redirect. On a scale of 1 to 10, redirect setup is about a 2.
