Just wondering, did you ever have any luck resolving this issue? I'm having the same problem - just hanging after tuning and staring at the amps...
Clarification: I've successfully loaded legit DLC (369 tracks) and it works, but it's the CDLC that doesn't work for me. The CDLC will show up in the song list, but then it just hangs "at the amps" as we say. I've run the "RUN_PATCH_RS.command" but still not getting the CDLC to work.