One day I started taking a good look into the summons settings in the TESCS. I found two spare summons spots (If you have Tribunal and Bloodmoon) that were unused. So I tinkered with them until I figured out how to use them.
How to create real summon magics. (PDF Document)Icon creation is something every game modder should know how to do. Fortunately for Morrowind, icon creation is quite simplistic. I tried to use other tutorials to make icons, but I found none that were idiot proof and or up to date. So I made my own tutorial complete with lots of screen shots to show the way.
How to make icons for Morrowind. (PDF Document)