I have a slim running 3.71m33-4 and have downloaded 2 separate cso files as a backup to a game I already have (GTA lcs). I should stress this was 2 separate downloads and not a similar issue to those threads where winrar opens a file to reveal multiple files. How do I rejoin these 2 separate cso files into a single cso file that I can play? I've searched this forum and have seen the guide on command line prompt - /b copy 1.cso + 2.cso etc, and have not managed to get this to work. I know I could rip my umd as I have m33, but I've set myself the challenge of joining the cso's! Any suggestions appreciated.