Hi Tano, I reckon you can but I can't give you the full details:
there's a "View/Edit" in the piano roll window. It has a drop-down menu whose last item is "Pitch control". In it's standard form it only gives you a tone up or down, but I'm sure that some time ago I came across an article on Midi controllers somewhere on the PG site that talked about varying controller parameters such that bigger bends (much bigger, I think but not certain) are possible.
That exhausts my relevant information (and memory) so you'll need a better guide than me to get you to that article or other useful stuff.
Good luck!