thanks for the fast reply. i am using ndsCRC and its renaming them all now. im puzzled by 1 thing though. I have a zip file of a rom, and when i rename it it doesnt add the "-" in between the rom # and the title. The parameters are correct, and the other roms that get renamed in that batch were renamed correctly. I wonder why it wont rename the zip and the nds file for this particular rom. It gets put in the archive folder with the rest of the ones that did get renamed. so i dunno.