Copy the esm files for the dlc. Open up the game folder, copy anything that looks like dlc to your game folder. It should work as long as you've purchased it. If you have a wireless lan controller like most laptops do, just drive to mcdonalds or starbucks and download the stuff there.
Thanks for your reply david, unfortunately i am using a desktop PC so I cant take it to places with free wifi, but when the DLC comes out i will give the esm thing a go and see if that works.