many thanks for all the help and advice , i have download around 8000 roms from searching google , i did try out Clrmamepro but for some reason allthough i follow the instructions it did not seem to work i expect it is me or the rom in question which is 1941 - Counter Attack (World), when useing Clrmamepro it was saying that there was over 200,000 roms ? when i only put 1 in the folder , i am very new to this sort of thing and i expect it will take me a while to get the hang of things , all though i search google for roms i keep finding ones that have problems ,thanks