The Beatles: Rock Band multitrack .bik files (Please Help!)

[ummagumma]

I've been trying for the past couple of days to crack the encryption on this file:

The Beatles- Paperback Writer .bik file: http://www.mediafire.com/?zhmmmymizyo

You would normally use Rad Video Tools (google it) to crack them but it seems they've encrypted them. There is an extra 56-byte header, that when I remove I'm able to view the channels, but as I go to convert it to wav it crashes. Can anyone please help? I'm sure some of you would like to get your hands on some Beatles masters

[hinafu]

WOuld you PM the tracks (please upload em to Rapidshare with password) then I could see what could I do...