[quote name='metaly']I had a USB adapter for my GH1 guitar and it didn't work with Rock Band. The error message I got sounded similar to when you try to use a PS3 GH3 guitar, so my hope was that if they ever release that compatibility patch, it might get PS2 guitars to work as well.
The adapter did get the guitar to work perfectly with GH1, at least.[/quote]
I need a couple of those. Where did you get yours from? GS, EBGames, BB, CC, and RadioShack don't have them. Some GS employee told me that Sony stopped making them. Then I said what about third party adapters, he said he wasn't sure if anyone else made them. BB and CC employees tell me they don't think that exists. RadioShack employees say they don't carry them anymore.