You have to install JDK and OpenLaszlo Server 3.4. Then extract the source file videoConf.lzx from red5.war and mod the <view x="0" y="0" width="320"> sections with a text editor just before the code below for each window:

<view id="flvView0" bgcolor="0xC0C0C0">
            <method event="oninit">
                this.setSource('myVideo4.swf');
            </method>
           
            <method event="onclick">
<![CDATA[

                if (stream == ns0Name) {

After you mod it, save the file then use OpenLaszlo to compile it.

I found that if I drew what I wanted it to look like, then came up with the cooridinates for each box, it was easier to enter it all after. Here is an example of a 6 user chat, the first user is 640x480, with the other users at 320x240 arranged around it. I have included all the files to make this work including the source...

Here is the cooridinates I used to make this happen (the blank boxes are part of the 640x480 window):