List boxes can be defined as "Smart" which means their contents will be loaded directly based on a query definition. What you do is first create a Nomads query
that defines the data you want loaded, then define this query as a Smart Load
for the list box. If desired you can specify triggers as to when the query is to run and/or be refreshed along with data to pass to the query so the contents can be filtered.
We did something like this in the "Bells and Whistles"
portion (Part 5)
of our Live in 30 video presentation
on this forum. While this was actually targeted for iNomads, the exact same logic works in plain Nomads as well.(The Nomads screens in the video are from a prior release but the setup/functionality is the same on newer versions)
I am not certain what you asking about when you mention Folders, perhaps you can clarify.