Possible Project: Fallout Equestria: New Pegasus

Greetings Fimfiction, Joker here! Well, with my recent acquisition of Fallout 3: Game of the Year Edition, and my growing love for the Fallout franchise, I figured I would try my hand at this Fallout Equestria thing. But, how to do it? Why, the answer is simple: an MLP adaptation of Fallout: New Vegas, following the Yes-Man Route. All I really need to do is figure out which MLP characters will play what characters and what not. Any input or two cents anyone has to help me perfect the formula would be greatly appreciated. Here's what I got so far:

Courier Six: Sunset Shimmer
Benny: Prick Blueblood
General Lee Oliver: Either Shining Armor or Flash Sentry (because who wouldn't want to chuck a Gary Stu like Flash off Hoover Dam... do people still hate Flash Sentry?)
Mr. House: Mr. Kingpin
Veronica Santagelo: Scootaloo
Rose of Sharon Cassidy: Gilda

And that's really about it. So, yeah, help and suggestions would be nice.