Hi,
I realize this post is quite old, however I built the Tims Spells mod and thought I could lend a hand.
Recently I've been rebuilding the mod and hope to integrate some of the more popular spells into it.
I don't know everything about modding Oblivion but I'm a good at scripting and I think I can help out here.
I'll be creating a Create Undead spell soon, which function similar to JPMs, your welcome to copy the script and modify it to suit your needs.
There will be various other spells which allow you to capture, control and command NPC characters.
Link to Tims Spells.
http://modsreloaded.com/index.php?id=108