i had the same problem with charlotte.....but in sum 08 somehow it worked, but maybe i had found the files the game needed earlier, i dont now,. the only thing i can recommend is to keep trying replacind files in the renfe and render folders ......good luck
in sum 08 it's cb. but in tru 09 it's ch. may be its the problem. you should uninstall the sum 08 or change the codes to cb or in db commander 2000 change the cb to ch. these are the best ways i know.