65 Launch Gadget and Mozilla

I've configured the Zen65 Launch gadget as per the docs. And a page for it
appears to be present in my VO. One issue, we are trying to go Mozilla and
Firefox etc, but the apps to our terminal server only seem to be launchable
through Internet Explorer.

Mozilla gives no error, just sits there stating " Please wait while your
selection is being launched... "

Is this Launch Gadget IE only, if so - is the a Mozilla Version on the way??

Thanks.