Nikki wrote...
....
One potential problem... if another user of the program does not have
this add-in installed, would this work for them? This program is being
created for co-workers for their ease of use. In addition, the program
might be used on multiple computers - laptops, convertibles, tablets,
etc while we go to outreach centers. If the add-in has to be installed
on each one of these systems that would make this a bit of a
headache.

If this is for co-workers, then each of them would have to have the
MOREFUNC.XLL add-in or you're back to needing to use udfs.