I’m trying to use a custom animation to handle moving my character forward for a certain scripted spell effect. I have modified the power forward attack .KF and wish to now import that into the game to use with PlayGroup. I am not seeing how it is possible to do this however.

OK, so I was just reading http://cs.elderscrolls.com/constwiki/index.php/AnimGroups, and it seems all animations do have to be set to one of the pre-defined groups.

I am now somewhat confused. Would that not just add it to the pool of available animations for that group, and so create a chance random characters would use it when they weren't supposed to?

Also, and more to the point, say I added my custom animation to the AttackForwardPower group. How could I reliably play it with PlayGroup? Wouldn't the game just randomly select a forward attack animation from that group, most likely not the custom one I want?

If you want to script and animation, you should make it a idleanim in the group special idle.

this should help:
http://cs.elderscrolls.com/constwiki/index.php/Forcing_Idle_Animations

Thanks! I had actually stumbled on that method, though not that tutorial you linked.