Yes close stunning is the key, the VP will try less to run up ramps is you stay closer, plus running into to him (avoid the swipe) can slow him down especially if hes constantly jumping aswell.
The CCG hold scheduled runs for Stun/Crane Pratice, not sure how it all works, probs need to go to their forum section and look around/discuss. I would think you be expected to know and have tried the basics first though.
So go to Sell Hq section and Try the Guides.
Try
The Dogfathers Guide to VP it cover all the basics, but there are some sections on stunning and close stunning with some helpfull pic of postioning etc.
'Keep it Kool
'