The client is actually requesting their customers be able to select residential vs commercial, rather than hard coding it one way or the other. So we'd have to get it to some how automatically update that data.
If changed where you indicate, does that pass that variable for ALL shipping methods (overnight, 2-day, etc.) and not just ground delivery? David Buchholz, who is helping me with this site, seemed to think the webassist code was only passing that residential flag for ground delivery, which seems to conflict with what I'm hearing from FedEx.