The resource rate is a bit more difficult to work with, but as for supply you can change one file.
in the Gameplay.constants file look for
not sure but I think the resource rates can be found in there somewhere too, but I'm not real sure on what to alter to effect it the way you want
anyway, reduce the scale to .25 or .50 to reduce it to what you want, play with it ^^
and the Gameplay .constants file can be found in your DS mod's GameInfo folder
and Notepad++ will allow you to retain your sanity while looking for these
had a duh moment
right above the fleet scales lol