To be honest with you, nobody really knows; neither do I. But a lot of people are asking that very same question. I think you're gonna have to go to the store you bought it at. Hope that helps! :)
It is not an expansion pack for Fallout 3! Fallout: New Vegas and Fallout 3 are separate titles. As for how to acquire it, you can purchase it almost anywhere retail video-games are sold.
Occasionally Fallout: New Vegas will freeze, but not as frequently as Fallout 3.
fallout: new vegas 2 I've heard.
Fallout: New Vegas
In my opinion Fallout New Vegas is. In Fallout NV it is easier to make caps so you can buy better wepons and ammo. In Fallout 3 It's hard to make a lot of caps in the begining making it a slow start. But is you want to test your skills play Fallout 3.
Fallout New Vegas is the fifth installment in the Fallout series. It is for the Xbox 360, PS3, and the PC.
Fallout new Vegas
No, you can't get married in Fallout: New vegas, but you can have sex in the game :)
Yes they are, although they play much smaller part than they did in Fallout 3
fallout new Vegas will be on PlayStation 3 and Xbox 360
In my opinion, Fallout 2.
Fallout New Vegas is all one game.