OK, I recommend studying voice file names. The voice type displayed in a listing of folder contents depends upon the file name, not the MSB/LSB/PC. If it did depend on MSB/LSB/PC, then the OS would need to read the voice file itself and that is too much bother.
Voice file names have (at least) two features which affect how the name and info is displayed: ICON and file extension. ICON is beyond explanation here. but it appears in a voice file name like "T228".
The file name extension controls the voice type which is displayed. "vce" is a regular voice, "sar" is a Super Articulation voice and "sa2" is a Super Articulation 2 voice.
A complete voice name appears like "KinoStrings.T250.sar" -- a Super Articulation voice with the icon selected by "T250".
Hope this helps -- pj
P.S. If anyone needs information like this, they can usually find it on Jørgen's website:
http://www.jososoft.dk/yamaha/