What an.. unusal way to approach such a problem. Woah, but I liked it, very much so, thank you! Additional points for clever use of portrait Snape ;)
And apart from that spectacular second part.. I'm still in awe and a tad surprised at how you maintained that dark theme throughout the whole thing. Especially Harry's thoughts and memories when he remembers, and that perverse golden path.. such sadness.. Brilliant, thanks again.