This is how to fix your campaign (obviously)

First of all, make sure your disc 2 is correctly extracted to your console

Move your content folder from your AW Disc 1 over to your hard drive (content\0000000000000000\41560914), you should have /00000002 next with these 2 files in it:

4156091407406280 (2,083,808kb)
41560914051BF3C0 (1,935,016kb)

These are your campaign files, if campaign doesn't work it is most likely that these files did not copy correctly... (I was copying these from the 41560914 folder and it wasn't copying these files completely...) Make sure they are the proper sizes, if not that is your problem... Just copy it over with a USB/Neighborhood

If you are getting a message saying that you need to download a content package you are most likely launching disc 1