You taking the badge off the old grille? If you are, I've done this with my old grille. Big screw driver. But, I would recommend getting a new badge from revolution.eu.com or scoobywworld as you are going to need to buy some adhesive anyway to stick your original badge back on.
I would leave the badge on the old grille and lash it on ebay, and buy a new bagde for the new grille. Just my opinion tho.