How Can I Add objects Or Buildings In to My Game?

[EduardoHudson]

Hello Everyone, i'm a First Time Modder

How Can i Replace or Add Any New Structure In My Fallout3/ New vegas ?

I'm Tired Seeing Blown Out Structures And Buildings.

Any Tips ?

I'm Trying To Make Like a Grand theft auto Map.

[RoyBatterian]

Please don't make multiple posts asking the same thing.