TBH I doubt you'd be interested in the main series if you play this as it's nothing like the main series. This game is more like a card battling game (like the SNK vs Capcom card battling game)
Oh I've found one problem with the RawkSD installer (the one you in HBC). The app leaves the Wii in mono mode and the only way to restore the sound is to reset the Wii. Can this be fixed?
The WT instruments will work with all the GH games and RB2 and RB:Classic Rock Pack. The RB2 instruments only work with RB2 and a few of the TPs. This problem is only on the Wii though (support for other instruments was patched on the other consoles)
There's a link on the first post and from there you can click a different Continent to see the time for the show in your area. London's is 5PM GMT as stated in the first post.