My goodness it's so simple; you go in editor under object editor then to spells/abilites and then create a new spell and base it off of the paladin heal ability. Wow... people these days are becoming less and less knowledgable.
This is indeed noob question. If I were you, I would first start to WORK with the WE, with the Object Editor and of course, with the Abilities section in the Object Editor. It's pretty simple if you have time to experiment. And of course, you have to play a little warcraft as well to know all the spells existant and so... the basic posibilities with no trigger enchancements.
Yeah guys, I'm also a noob so I take offense to your ribbing him about his lack of knowledge. He asked for help either give it to him or don't, keep your worthless critisicm to yourselves