>How was this done? What sort of technic was used?

Can't say what exactly Michel did, but I use a little bit of JavaScript to load
on frame then have that one frame update the others using code like the following:

{!-- //
if (window.name == "Message")
	 parent.Toolbar.location="wc.wwt?wwThreads~updatetoolbar~RPX0G9KWS~RPX0RTTHC~RPX0G9KWS";
// --}

The If is not really required, but it makes sure that the page is actually in frame mode,
rather than being loaded from disk (people tend to save HTML pages from my message board -
without that code you'd get a JScript error every time).

If you have more than one frame you use additional parent.FrameWindow.location lines to
update them with other URLs. The key is to draw the frame that has all the logic to allow
the others to draw. For example, in the above the Message IDs are passed to the toolbar
window using WC's ##pcMsgId## syntax.

Regards,