>1) Other than the set printer to name on Windows NT, does VFP handle or process the non drive letter mapped volumes with the Universal Naming Code: \\servername\ResourceNameLikeVolumeOrPrinter

yes - you can SETDEFAULT TO/CD to aUNC, or reference files by UNC unambiguously in VFP 5 or later in all cases.

>2) If VFP has other uses for the UNC than set printer to name on Windows NT, what are they and how do we use them?

Any place you need a path or file name you can use a UNC.