How do I re download the gamestop pre order bonus since I backed out of the original download and had to delete it?

You should be able to see it when you go to Downloads on the game main menu if your code was accepted.

Didint see it last night but it may be because part of live was down at least I hope so.

Try not to download the pre order bonuses if you can help it. They are full of bugs and may crash your game. Wait for a patch for the entire game to be released, and then download them.