Oh, yes I liked the story, the way you used details from canon in entirely different setting. And wow, did I laugh when I read about Harry walking in on Sirius and Remus... Not to mention Remus tying Snape to the chair.
Good story! But there were some other typos as well. Besides that funny one I mentioned previously.
Otherwise it's all good. And like ivylady commented, I would not objects to more of this. It's an interesing universe you have created and I must say I really enjoyed the fact that your Snape was very snarky and all that :) Oh, and the fact that you let Harry be smart, figuring somethings out by himself.