When you say the 2 screws that go through from the front, I take it you are meaning the two bolts that you access through the slats of the grille. They attach to a metal bracket that sits in front of the Radiator?
If you've done them and the two bolts that fix the rods that attach at the top brackets of the grille, then I think you should find that it copmes free quite easily, or at least mine did.
This website might help... he details removing the grille at the bottom of the page...
http://restaurationflavia.over-blog.com/96-index.html