PR is history and so are rankings
I offered a friend of mine some space on one of my sites. He said, but why would I want that? That page would have no PR. Yeah, of course it won’t have PR I replied.
But don’t look at today look at tomorrow. Because as soon as you get that little magic green bar you are looking at history.
I think he thought I was a little too philosophical that morning.
The point is this you cannot change the rankings or the PR of today, only the rankings and PR of tomorrow.