I've have been using the simply austin guide to set up hyperspin with rocketlauncher. So far snes and genesis have been easy with retroarch, but when I attempted nes I hit a wall. rocketlauncher has detected my ROMs, but when I go to launch one the message in the picture I've attached shows (sorry its sideways). So I then booted up retroarch when to "load content" then "select file and detect core" and selected a ROM it gave me the message "no cores available". Then then went to "load core" loaded nestopia and the a rom and it worked, then did the same with quicknes and it worked. Has anyone else ran into this problem before? I need help.