EDP mono in stereo mix

["M. Steven Ginn" <sginn@airmail.net>]

How does one take a mono EDP and incorporate it into a stereo mix
(without having the benefit of 2 EDPs)?  Do you split the output and
bring it back to the aux return bus as split mono? Do you bring it back
as a mono signal to a single channel panned in the center?

Thanks,
Steve