im pretty sure its not merged looks like bios's have their own zips, chds are each in a seperate folder manching parent rom zip file name, noy sure if the roms zips are merged or not as there are quite a fre with the same name but serperate identafires ie bob , boba, bob1, bobc ect.... What are your thoughts? Oh and as Crochety as I am I do thank you very much, From the binary of my code, for all your tips and help.