I think Jamie How, looked to be the best of the potential openers. I just remeber watching Papps play in South Africa and really struggle. His domestic average is only in the low 30's which may surprise some people(Papps, not How).
Vincent should be at no.4. Sometimes i wonder what his record would nhave been like if he had batted in the middle order for his whole career, much better I think.
As for the other opening spot, I think Papps, Fulton, Marshall, are around but I would go for a bit of a left feild choice in Rob Nicol, from Auckland. I know, I know, he is a middle order player being asked to open again, but Justin Langer was a middle order player, Sehwag was also, it can sometimes work.
I think he has a good back foot technique, is not really a stroke maker, and often plays like an opener, a little bit dour. He does have talent though and really,, what else do we have to lose?.