So can you use an adapter to use your PS2 guitar on the xbox 360?

Now I do have rockband on the 360 and thus a guitar controller but it apparently doesn't work on GUITAR HERO games. I was wondering if they make a ps2 to xbox 360 adapter for the guitar controller.

I know they make the ps2 to usb adapters for the pc. Are there any confirmed reports of this adapter working on a xbox 360 for the guitar controllers?