Don't forget that 4coder is still in alpha stage (not even beta) and was released only because it was needed desperately by the community. Allen still didn't finish to define the features (and the documentation) but it's desined well enough to understand whatever you need after a bit of testing.
If you want updated examples of modal customizations to 4coder, I've released
my own custom layer on github, and there's also
ChronalDragon's vim clone.
If you have any specific questions you can also ask in
the 4coder forums and most likely someone there will help you.