Allright, Character's almost lvl'd.
Only snag is I can't remember if you were allowing splat books or not, so I figured I'd ask for approval of a feat from Complete Adventurer.
It's called Devoted Inquisitor. It allows me to freely multiclass between rogue and Paladin, and if I strike someone with a sneak attack that's also a Smite Evil, they have to make a will save (DC 10 +1/2CL + cha mod) or be dazed for one round.
("WTF? Was that a sneak attack from a paladin?!?".)
In order to properly become a Shadow Knight, William needs to learn the art of stealth. I'm going to attempt this with multiclassing into Rogue. If the feat's allright, he'll be paladin2/rogue1. otherwise I'll have to take a few more lvls in paladin before William starts down the rogue path. I just figured it's easiest to describe it now, what with his spending so much time with Estelle, and his recent 'contact' with The Shadow Knight.