Afo... payal gave me admin access, so I don't know what's in the php for his templates, but I could not get IH2 to work with any of his custom templates. I pointed out that some of IH2's php files need to be in the over-rides directories of the chosen template, and looking above, that seems to be the case.
I cleaned things up a bit (he was using gifs in some cases which don't work with IH2 and some of the jpg's had very peculiar names - eg: microsoft/special/wertr_iio.jpg... yes, the name included the slashes!)
On his installation, IH2 would ONLY work if I reverted to Classic Green, and uploaded my own test products with my own test images (suggesting that payal had correctly installed IH2 for this template).
But as he says he's also correctly installed it for the other template, I can only suppose there's an incompatibility there (and as I don't have access to the php, I can't be sure...)