David,

>What if you include the active X control in your setup routine? Do you know if it still requires IE to be installed? I use this control in a couple of apps, and it didn't occur to me that IE would need to be installed. I haven't heard complaints, so I'm not worried at this point, but I wonder if just including the control in the setup was enough? Any idea?

I can tell you from personal experience that it does need to be installed. Just having the control is not enough. Thank goodness that some of the users' machines had IE4 installed. That was the only difference and the clue needed to get the project going that day.
HTH,