I got fallout 3 on steam the other day and brought a DLC disc from game shop, when i let it automatically ionstall it didnt add the content to the game. Do I have to manualy install it into the fallout 3 steam folder?

I could be wrong but if I remember correctly you need to get the DLC from steam if you have the steam version of the game but incase I am wrong...

Check the launcher's "Data Files" to see if the DLC are unchecked in the list.

Ive checked the data file list and they dont appear