PlayStation 3: On the cross media bar (XMB) go to the "PlayStation Network" icon and select "Account Management," then select "Redeem Codes." Enter your token here and select "Continue."
This is only part of what you do. It does not say to go into Lego Rock Band, let alone the Lego Rock Band store (and not the PSN store) to pay the $10 and then get the 1.2GB download. I'm pretty quick with these things and even I was confused...I can only imagine how it must be for some other people.