Well, that answers a few questions even as it intorduces more complexity into matters (rather sounds like Real Life, that way). Somehow, I don't think Snape's parting effort is going to have quite the effect he expects, esp. since he -really- doesn't know Zed's real power and abilities, let alone -why- Zed doesn't trust him. chuckle I bet the conversations between Zed and Harry were more than a little interesting, though I suspect the revelations of who/what he will become might have provided some centering for Harry at that point.
This is definitely a fascinating story and I love the odd bits you've thrown in here and there.