I finally got a better laptop witch can play FNV. I want to mod my game, witch one is better for that the store or steam version?

They are both the same. Even if you buy the game in a store, you will need to use Steam to play the game.

But do i still need to use the cd then?

Nope

Store it is then. thanks for the help.

ill take a disk over a game bought online any day