well when i have the dead money dlc on my xbox, the game is laggy and when i save it freezes, but when i deleted it from my hard drive, everything is running smoothly?

explain why its like this and how it can be fixed?

It will (hopefully) be fixed with a patch released by Obsidian.

FO:NV is horribly buggy for no clear reason.

so basically i have to wait for a new patch before i can play the dlc i payed money for?:/ i mean its only 5 dollars, but months of waiting right out the window

Basically.

I mean, you COULD try to get a new 360 or (completely) wipe your harddrive, but other than that, nothing much you can do.