Actually...
Yes, you put your whole list out there but....
Download a list from the VOX toneroom.
Once you have loaded your current ST list you can open other TLST files in the librarian and "copy" any individual preset you want from another list and "paste" it into your list where you want them

So...when you do decide to put your tlst file out there...could you sprinkle some "Voxman" dust on it and make me a good guitar player?
Sevan