Basically I have no clue if this is still of use for somebody, but recently I have started to develop a Multi Purpose GUI for my own project, but also for Lightwave's TESAnnwyn and TES4qLOD. Now I was able to test the GUI also for Fallout 3 together with TESAnnwyn:

This is the http://tes.nexusmods.com/downloads/images/41447-1-1329062673.png (which is generating a bitmap from a esp/esm list).

And here one can see the http://tes.nexusmods.com/downloads/images/41447-2-1329062674.png (for reading a bitmap, and generating an esp).

The tool itself can be http://tes.nexusmods.com/downloads/file.php?id=41447 via tesnexus (although it can be used also for Oblivion, Morrowind and Skyrim, I would like to keep it on one page for better maintainability)

A more detailed description with a little bit of history can be found http://www.gamesas.com/topic/1324960-wipz-a-general-purpose-gui/....

This looks very handy, I didn't find the command-line overly hard to use but it's very nice to have something that simplifies it. I shall give it a go, once I've figured out what the hell I'm doing and have stopped the CK's heightmap editor crashing, that is.