Gaming Unlocking stuff in GHIII

[Hooya]

I was wondering if there was a quick and dirty way to unlock all the songs in Co-Op career so I can have a kind of co-op multiplayer for Guitar Hero. I have used the unlock everything "cheat" so all the songs are available in single and multiplayer, but that kind of multiplayer is only Vs. not Co-Op. The unlock everything cheat doesn't unlock every song in career mode, so I wonder if there is another cheat. I don't have someone to play with regularly, so for those rare occasions I'd rather not be stuck on what I've unlocked in specific difficulties if you know what I mean.

Thanks in advance.