Fallout 3 Discussion
Trainer Tools and Resources
I don't know much about keybinding in the Gamebryo engine, but you could probably use a script to activate a console command when you press a certain button using FOSE. I don't know much about it, so you might want to go ask the folks over at fallout3nexus.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem