AppleScript to close Quark V4 as V3

I would like a script that would force the users to close all their documents Quark V3, when using Quark V4. We have very few users on Quark V4 and they sometimes close their documents as a V4 and the rest of the users cannot open them. Until all users are on Quark V4, I would like the V4 people not to have a choice of closing documents in V4 or V3, just always close as V3 document.

: I would like a script that would force the users to close all
: their documents Quark V3, when using Quark V4. We have very
: few users on Quark V4 and they sometimes close their documents
: as a V4 and the rest of the users cannot open them. Until all
: users are on Quark V4, I would like the V4 people not to have
: a choice of closing documents in V4 or V3, just always close
: as V3 document.

AppleScript won't be able to alter the Save menu in Quark, but it can save documents as version 3 or 4. This means that it can make saving as v3 easier, but cannot change the way people save documents; they'd have to run the script to close and save as v3 instead of just closing and choosing "Yes" when prompted whether or not to save changes.
tell application "QuarkXPress 4.11"
    if document 1 exists then
        if file path of document 1 is null then
            set theFile to (new file with prompt "Save QXP v3 document as...")
        else
            set theFile to file path of document 1
        end if
        save document 1 in theFile version vers 33
    else
        beep
        display dialog "No document is open." buttons {"Cancel"} default button 1
    end if
end tell