If you are serious about this..
I hope you realize that anybody who has played the fallout games will probubly not be impressed by your version Unless you put tons and tons of work into it.
The complexity, how there were so many ways you could advance and the insain story depth are what made the fallout games.
I gave a low score because it seems like just a dream at this time, I hope you can pull it off because that would be awesome.
Good luck with this, and like everyone else has posted before... be careful with the copywrite laws and stuff.
Fallout Rules.