Vista - Launching medium integrity process from activex in IE protected mode

Hi all,

I have trouble finding out how to launch a process in medium integrity
level from an activex
within IE in protected mode (thus low integrity level) - with a
consent dialog of course. I am
doing this while using a Guest account. Can someone point out how to
do that? I have gone
through all of the MS/Technet documents, the only thing I could find
was suggestion to
"use a broker process"... well, if I don't have a broker process
running at higher integrity level, I wouldn't need to spawn another
process with higher integrity level in the first place
if I do...

Thanks alot.