UPDATED: Sundry Info to Comments v2.0
Correspondent Kerry E. emailed to ask if it was possible to somehow sort tracks by their file's file path or at the very least be able to create a Smart Playlist using the file path. This reminded me to dust off Sundry Info To Comments and I have updated it to v2.0. This script can paste various non-standard tag data and file info into each track's Comments tag, including the file path, parent folder path, file creation date, and so on. Thus you can use text in the Comments for SP creation and sorting schemes.