Yes, so I wanted to use a cheat for Fable and to use it I had to clear my cache. I didn't use the code, I just selected the option on my Hardrive. Next thing you know my DLC for Fable was corrupt...
I thought, oh crap, please don't let this affect Oblivion: it did. However, it didn't totally screw me up.. I can't use any of the dlc except orrery and thieves den. I would just redownload it off XBL but I'm at college and the firewall won't let me access XBL.

I was thinking, If I took all my content and placed it on a removable memory stick and started up the game without and dlc then plugged it in later, would that re-activate my dlc? In otherwords, I'm looking for ways to reactivate my dlc without having to go on XBL.

Any Suggestions?