mesh grille installation

somebody please help. i'm trying to install my new grille, but i can't get the bumper off. by the way i have a 2000 civic si 2dr. 5spd. 1.6 vtech and the grille goes over where the honda emblem is and in the bottom part of the bumper.
someone please help me.
i think i got from automotion or something like that.
i won it off of ebay.