Setting up key bindings for extended characters

[David Courtney]

I'm trying to learn Spanish and I'm looking for a convenient way to
access the accented characters that are used in the Spanish language.
I know about turning on num lock, and then holding down ALT and typing
in a key sequence.  But ... for some reason, that's not working for me
in X.org / Openbox ... (though it works if I'm outside of X.org).  But
it doesn't really matter because I'm looking for something more
convenient.

I was thinking about setting up a keybind chain like CTRL+ALT, then a
to give me á.  CTRL+ALT, then ? to give me ¿, and so on.  I can work
out the exact key sequence on my own.

My question then is concerning how to edit my rc.xml file to do what I
want.  Obviously I would set up a keybind, and I'm even familiar with
setting up a chain.  So I would want something like:

<keybind key="C-A">
        <keybind key="a">
                <action name="?????"/>
        </keybind>
</keybind>

So the exact question is, what would the action be?  How do I make the
á character print/echo to screen upon completion of the command
sequence?

P.S. If someone has a better idea that is completely different than
what I thought of, I'm open to suggestions.