I hate to break this to you, but this is the internet. You can't always entirely trust people and they can't always return the same favour.
As far as I know, there is no released Arktool compatible with Lego Rock Band (could just be the PAL version that is broken) and no one has released a guide.
That said, you/"your friend" have a few options (not limited to this list, for example 'walking your dog' won't be in this list to save space):
-Just play the game separately, yes there is no online (and when in RB2 you'll be limited to playing with other Rawk users), but it is still a somewhat decent game.
-Attempt to crack open LEGO Rock Band yourself.
-Purchase and download some more songs for Rock Band 2, HMX and music artists need support too you know!
-Wait, just like the rest of us. The Rawk developers may be busy with things like University and perfecting the SD/USB loader, good things take time. Remember, they didn't have to release the flawless RawkSD to the public, and the next generation is a lot different to versions 1 and 2.
As far as I know, there is no released Arktool compatible with Lego Rock Band (could just be the PAL version that is broken) and no one has released a guide.
That said, you/"your friend" have a few options (not limited to this list, for example 'walking your dog' won't be in this list to save space):
-Just play the game separately, yes there is no online (and when in RB2 you'll be limited to playing with other Rawk users), but it is still a somewhat decent game.
-Attempt to crack open LEGO Rock Band yourself.
-Purchase and download some more songs for Rock Band 2, HMX and music artists need support too you know!
-Wait, just like the rest of us. The Rawk developers may be busy with things like University and perfecting the SD/USB loader, good things take time. Remember, they didn't have to release the flawless RawkSD to the public, and the next generation is a lot different to versions 1 and 2.