Download games for windows software,copy saves to differant location...re-install,install patches and mods,copy saves back.
The DLC in Fallout New Vegas allows you to do more missions, which means yes, it keeps you playing.
From the xbox live marketplace
No no more DLC is being developed for Fallout New Vegas. There are; however, multiple Area 51 mods you could take a look at.
Downloadable Content for Fallout 3 for PS3Yes, there is downloadable content for Fallout 3 for PS3. Check in the PlayStation store online.
No obsidion said they would not release dlc that extends gameplay past the ending
now
now
Gun Runner's Arsenal.
All of them except for the "Dead Money" DLC.
Yes, you can use weapons from Fallout New Vegas DLCs in the base game.
The Sierra Madre is the location of the Fallout New Vegas DLC Dead Money. This DLC cannot be bought anywhere on console other than live.
You need to have the 'Lonesome Road' DLC installed, the Canyon Wreckage is the starting point for the DLC.