No, you would have to go to V21.1 or earlier. See
http://www.xoutpost.com/articles/all-...ystem-faq.html for what disks take you to what level. Since you are at 3-1/63 already then you need to go down to at least 3-1/62.
As for the voice files, in theory I think it's possible. But I haven't seen confirmation of this on a MkIII yet, just a MkIV.