It looks like the functionality you seek was abandoned when the script
was rewritten, probably because it is a rare use case. I suspect a
patch to add it back in would be accepted as long as it doesn't break
anything. It would need to have a clear message for the normal users:
"KK7DS Runtime not found. Do you want to install it, or use your
own?".
Also, the OS X app is pending a rewrite that will get rid of the
runtime altogether, but I believe Dan is waiting on a Mac-savvy
developer to write it. Any patch you submit for the existing script
might not be around very long (probably still worthwhile--I don't hold
my breath for promised rewrites!).