Forza Motorsport 3 Downloadable Content Question?

I just purchased Forza Motorsport 3, and I noticed that it comes with a redeemable code for more cars and tracks (the “Motorsport Legends Car Pack”, “Sidewinder Proving Grounds Track Pack”, and the “Benchmark High Speed Ring Track Pack”). I redeemed the code, and my Xbox said it was downloading the Motorsport Legends Car Pack (about 450 MB) but that was it. To people that have also downloaded it, are all three packs included in one package, or is there something wrong here? If I am missing packs, how do I download them?

go onto the market place and the ones you ahve downloaded should have a tick next to them the ones u havint will ahve the price next to them. cars have to be bought in the game using the credit u earn during races.

Forza Motorsport 3 Nears Finish Line