Im sure you can. Ive always loved the europas but didnt care for the fact they took away the aft cabin. I think the set up in the pic is awesome but some may find it not so visually appealing.
I have considered something similar on our boat, still in the thinking about it process.
I like the extra shade and rain protection, I would also put my dingy up there. Not sure I'd like my aft deck covered because we like to fish from back there.