The reason I didn’t get Guitar Hero 2 on 360 was because the guitar was wired. I use wireless on PS2 so why go a step backward? It seems people like me will need to shop carefully when getting the guitar bundle, as a few stores have 2 different versions. One comes with game and wireless Les Paul guitar, and other with game and wired X-Plorer (the same guitar in the GH2 bundle). The wired bundle is priced 10 dollars less, but wireless is really the way to go.
You want this:
UPDATE: Apparently there’s a problem with the PS2 version coming with the Red GH2 controller as well.
Try looking to other stores besides Wal-Mart, as they seem to be the main source of this bundle.