Yeah, I know... but why not just move everything over like that? If there's stuff on your new hard drive, just copy them back to the old hard drive and then to the transfer? Just did some searching and apparently the Cagney Pack is rolled into the Bikes Pack... but maybe you can just play it with the Bikes pack to see if that's true?
Man, I really hope I get a chance to fire up Burnout again sometime soon, I consider it my ubiquitous racer at the moment since it's sitting on the HDD, no plans to get any other racer for the forseeable future.