I want to use http://planetelderscrolls.gamespy.com/View.php?view=oblivionmods.detail&id=3910 in my mod, however I don't know how to and cannot find anything that gives instructions on how. Can someone please point me in the right direction or write down brief instructions.

The basics are in the WIKI:http://cs.elderscrolls.com/constwiki/index.php/Idle_Animations

From my experience, forcing animations is not that reliable. Sometimes I can't make it work.
Besides, the hardest part is stopping the animation. In these cases, there is a reset animation that does the trick. "Actor.playGroup Idle 1" is also recommended.

Thank you!