Hi, Ignacio,
So far, so good. The modification is actually easier than I expected, while some notes for changes of the key combos, procedures and screen help are kept. Just for the experiment I managed to change this key shortcuts in SuperTED editor source code and everything still works as expected:

Besides <Ctrl>+<C>, <Ctrl>+<X>, <Ctrl>+<V>, <Ctrl>+<Z>... standard text edit combos, I have to think about those function keys assignments.