Spell that makes certain hostile factions stop attacking temporarilly?

[TerraMcCloud]

I was just wondering if its at all possible to script a spell that while under the effect of the spell, makes a certain faction no longer attack you on sight, in this case the Creature Faction. I wanted to make a spell that while its in effect allows you to walk amongst monsters/animals(not bandits or marauders or anything else like that) without them attacking on sight, but once said spell ends, monsters/animals will once again be hostile as they were before.

 

Any help? I've tried SetFactionRank but that didnt work.

 

EDIT: Looked at the Knights.esp and set up my spell in a similar way, made all the monsters that dont attack you while the spells in effect part of a custom faction, while you dont have the spell in effect, the monsters will attack on sight as you arent part of the custom faction, but using the spell temporarily puts you in the custom faction, making monsters not attack on sight.

 

EDIT2: Now I am wondering how to make it so the player cant equip any items to certain slots while under the effect of the spell like say, make it so the player cant equip a weapon, or a ring.

Edited December 21, 2013 by welchdrew