Vinyl Roof Question

My 71 Dart originally had a vinyl roof that has been removed, but that I intend to replace. In the top of the front and rear window openings, there are staples that were used to hold the edges down. Questions are..........
- how do you remove the old staples?
- do you leave the existing holes from the old staples for use with the new ones (I'm thinkin' not) or weld em up and punch new ones when the new top is installed? Thanks for your help. L8r