>If you make the WSH available,

A big if, huh? I can't yet depend on it already being there, and if I distribute it, I have to extract it, copy it and register it. What does that?

>OTOH, it's a lot of work, would need lots of testing and debugging, and by the time you finished getting it to work, the cost of a high-end installer would not seem unreasonable...

Yup...