These are a few shotguns modified with the G.E.C.K. They range from an alien blaster shotgun to a BB shotgun to a shitgun that converts two mini nukes into 25 high damage missiles.

You can find them hidden inside a rock container just outside vault 101 on the left wall, search around to find it. Inside you will find the following 12 weapons:

Alien shotgun
Flame shotgun
Poison dart shotgun
Plasma shotgun
Nuka-Shotgun
Baseball shotgun
BB shotgun
Shotgun that converts two mini nukes into lots of very powerful missiles
Hunting shotgun
Railway shotgun
A shotgun with high damage and fire bullets but a very large spread
A longer ranged sawn-off shotgun
Some ammo

Some of these weapons are obviously overpowered but I tried to keep most balanced with the exception of the BB shotgun. You can now view a preview of these weapons on youtube http://www.youtube.com/watch?v=rrMW3EYK1WI

---Version 1.1---
This contain only the two new shotguns, the winchester and Lincoln's shotgun. If you want the rest of the shotguns, you must install the first file too. The new shotguns both have long barrels and a very long range.

***INSTALLATION***
Simply drop the file "Shotgun Pack.esp" into your data folder in your Fallout 3 directory. If you have steam, this will be at C:\Program Files\Steam\steamapps\common\fallout 3\Data
Then start the launcher, go to data and tick the Shotgun Pack box.