Yes, I have additional information. But I think it's better to use email.
And we have a genealogical mailinglist for the county to which Niederschopfheim belongs:
http://lists.rootsweb.ancestry.com/index/intl/DEU/DEU-BAD-OR...
with some Niederschopfheim researchers.

I have already shared some data of your ancestors with another person who has same ancestors (Gallus, Rennwald) like you:
http://boards.ancestry.com/surnames.gallus/19/mb.ashx

Marriage: 19 Jan 1807
Groom: Georg Anton Ehret.
Parents of groom: Joseph Ehret. Magdalena Gallus.
Bride: Maria Anna Eggs.
Parents of bride: Martin Eggs, weaver. Luitgard Rennwald ["Ludgartis"].

Magdalena Gallus was daughter of Joseph Gallus, host in inn Sonne (sun), and of Magdalena Merckle. I assume your son have seen this inn. I hope he has bought the history book of Niederschopfheim?