1 - I doubt he has time (at least right now w/ his projects such as progen, director's cut, B4ME, etc.)
2 - Isn't editing EXEs illegal according to the EULA?
3 - Coding a program from scratch program would be hard since:
A - You'd need to learn/use the generals engine API from dlls and stuff
B - Getting it working with as many as WB's features
C - Getting it to save script/map files (if I'm not wrong you'll need to reverse engineer that)
D - The time to program such an app (EA had a team of programmers)
Its hard to program such an application unless DeeZire put his progress under wraps.