I'm still playing around with my own version using layers to achieve this effect...
Here's my .CAPX
It works (kinda) but is static for now (2 pages)... move the mouse on the right page and it will curl... click on the pagecurl to go to the next page
reload and do it again... etc :P
i think it would be better to mask the new page and just slide it in instead of setting it's width but i can't get it to work properly in constuct 2 with it's blendmodes :(