If path to file does not change: the file is not renamed, moved, and the drive letter is constant (you always use Z: and not \\Ns426291\ or anything else in RadioBOSS) - in this case, you can enable storing additional information in database. Please see this page for more information: http://manual.djsoft.net/radioboss/en/additional-information-storage.htm
Due to technical limitations, it's not possible to store additional track information for WAV files over a network drive.