currently no elegant solution, since &V[...]
variables are not supported in script directory names. As a workaround, put an
in each GuiXT script, and set
Set V[scriptsubdir] "1"
when the user clicks button 1,
Set V[scriptsubdir] "2"
when the user clicks button 2 and so on.
In the included script, use a "Stop" command at the
end so that the "normal" script is not executed.