Yep I checked the FAQ section and due to copyright it's a no go on the console (sighs :sadvaultboy: )
Something like the GECK wouldn't work on consoles. At a basic level for placing objects and modifying a value here and there, sure (and even then only if you had a mouse and keyboard for your console or Bethesda created a special version of the GECK for controllers), but creating real mods is a LOT more involved than using some COD level builder. There's no way you could ever, ever do it with a controller, and even if you could you need other supporting software to create resources (meshes, textures, audio, etc.) and some kind of PC-like file system to organize all of your data and resources. Can you imagine people designing meshes or writing scripts on a console and putting all of these complex components together into a mod? I sure can't. They could possibly make some type of way simplified version of it for consoles, I suppose, but that'd be about it. You need a computer to make real mods. Period.
I'm talking about Fallout 1 and 2 though, not 3. They play completely differently than Fallout 3, nearly everything is done with the mouse (including moving). Generally speaking that doesn't translate very well to consoles.
This. Someone apparently hasn't seen Fallout 1 and 2.