Charis,
A lot of the OpenMRS community is that the implementer conference
in Maputo this week, so responses may be slow. Unfortunately, to
the best of my knowledge, we aren't currently using the Register
module any more at any of our implementations at Partners In
Health. We developed it to use in Rwanda, but I just confirmed
with the Rwanda team that we are no longer using it there, so it
is likely that, yes, it is old and doesn't work with the latest
version of the Html Form Entry module. It looks like the last
release of the Register module depended on Html Form Entry 1.9, so
you could try using that version of the module (though,
unfortunately, of course, you might run into conflicts with other
modules).
Sorry that isn't more helpful--is there anyone else there
currently using the Register module?
Take care,
Mark