It's nice to see people using plugins with GUIs that I've designed

(though, still all the credits go to LePou for his awesome work).
Anyway, I advise you to try Legion plugin instead, and do a blind test (just to be completely unbiased) - I've always found it superior to any other ampsim out there, the distortion is much more smoother and accurate...
As for the IR - the Sneap Edge is great-sounding-organic impulse (if you're referring to "EDGE -1 Inch ala Sneap pic.wav"?), but it's missing some raw heaviness in the mids... So try blending it with some other impulse that's really all about cab resonance and lots of mid frequencies (something like some Orange cab impulse of a mic directed at cone or similar).