Just as a reference I made a http://i.imgur.com/tHPyD.png that I'm assuming is where I'd increase the cloak spawns for that type of guard so yeah, if my assumption was correct, what's the easiest way to either massively increase the chance a cloak will be given and/or that the NPC will always be given said item.
Thanks a lot in advance,
Gonk
P.S. This is going to be for personal use only so I'm guessing there shouldn't be an issue with not having permission from the author...?