I've been working on charm spells for PRR. I've posted a bit about the problem before, but here is the quick synopsis I posted to the nwn boards:
http://nwn2forums.bioware.com/forums/viewtopic.html?topic=611024&forum=1...
I've got the basic charm spell option working through a dialog option. I've almost got all the variations of the spell working. Next I need to tackle the items issues.
All of this would have been much easier if you could just target a friendly with spells, but what can you do?
I hope to have a new version of PRR with these functions included by the weekend. I might also try to update the example module.