Adding Main Menu and Start Screen stuff Help.

Dose anyone know a good way to add Start screens and Main Menu selections into the game engine?

Would it be VIA from an editor or hard code one as an Include and compile it when compiling the game engine code.

How do Pro engines like Quake and Doom allow you to do this in there engines ?

My trouble is there is so many ways Main menus and start screens can be made that trying to code a program to run in my editor that is flexible enough to create any type of start screen and menus seems way way to intensive almost like a Menu and Start screen Editor within it self.

Any Ideas.

My last idea was to just leave this part Blank in the engine with a default type start screen and Menu selection, then to change it just add an Include into the main code that will take over if present.
What I don't like is that this way you would need to recompile the whole engine to make it work.

I can't seem to see any other way to make it as flexible as possible.

I know Im a little vague, If you are having trouble understanding what Im referring to let me know and Ill do my best to help clear things up.


Thanks for any help at all
Stickman......