Hi there,
I bought the fallout 3 GOTY edition a year ago or so, and played absolutely fine when I had all the DLC's installed. A few months later, I had to delete the DLC's because I ran out of space on my HD. I also transferred all of my data to another Hard drive that had more space another few months later, but not the DLCs. I am not not sure how I can download the DLC's again, as when i try, it asks me to pay, however since I bought the GOTY edition that should include all of them, I don't want to have to purchase them.