Yes
Get your money back.
You can't download Fallout New Vegas add-ons, you have to buy them with REAL money. If you were to download them online if you have a PC, that would be considered illegal.
If you mean make a new character in order to play the dead money dlc then no you can use an existing character.
There is C4 in a locker which is in a room in the police station.
To mod Fallout 3, you must download the G.E.C.K. from the Fallout 3 official site. You can not download it for PS3. I've tried myself.
They recommend that you be at least level 20.
I could imagine that it takes place in America just like every single other game in the Fallout series.
In Fallout: New Vegas - Dead Money, the key to the electric room is located in the Sierra Madre's casino. You can find it on one of the two dead bodies near the entrance to the electric room itself. It's important to explore the area thoroughly, as the key is essential for accessing the electric room and progressing in the DLC.
All of them except for the "Dead Money" DLC.
Download GECK from Bethesda's downloads page
look for skullptura's rips...you can download it by torrent
Not yet. No release dates for the DLC 'Dead Money' have been announced for the PS3, but it is sure to come. The DLC was released to the XBOX Community on December, 21st 2010.