Jacananana - FMAEC
This mod adds Edward's coat from Fullmetal Alchemist to Fallout 3. It is just a piece of clothing and it only has the usual qualities of clothing, nothing special.
It can be found in a footlocker near the entrance to Big Town. (see screenshots).

Console Command to get "Edward's Coat": player.additem XX000EA7 Y
Where:
XX is the esp's load order; and
Y is the quantity of the item.

Jacananana - FMAMC
This mod adds a military coat from Fullmetal Alchemist to Fallout 3. It has 3 gold stars on it's sleeve, which, in Fullmetal Alchemist seems to represent the rank of colonel. It is just a piece of clothing and it only has the usual qualities of clothing, nothing special.
It can be found in a footlocker near the entrance to Big Town (see screenshots).

Console Command to get "FMA Military Coat": player.additem XX000EA7 Y
Where:
XX is the esp's load order; and
Y is the quantity of the item.

To Install:
Extract the files, then copy/paste the "data" folder into into the directory that your Fallout 3 exe is in. Say yes to merge the folders, and check the esp in either the Fallout launcher or FOMM when you start up fallout.

The files uploaded *should* work, but my Fallout game is heavily modded. If it doesn't work, leave me angry comments and I'll get around to fixing any issues ASAP.

If antone's interested in getting ignition gloves from FMA, here's another mod of mine:
http://fallout3.nexusmods.com/mods/17510