i can TRY to reduce the file size by deleting unused textures within the .txd archives, but since most of them are needed it would only be reduced by maybe.. hmm.. 1 mb or so, so it wouldn't make much of a diference.
on the m2s stealth server .. the old version of snow valley with 4mb only took a few seconds to download .. so ..is your server really that much slower? D;