Ah is it a lot more sticky im assuming?
so basically you put the wallplugs into the wall, then screwed the plasterboard into the wall plugs (but not all the way, with adhesive on the back of the board? Then once adhesive was set you just removed the screws?
i left the screws in as its easier to fill screw heads than it is holes.
the screws were purely to pull the plasterboard in, as the expanding foam exerts quite a bit of force.