I have a billet grille in my 98 F150 and its loose. Its mounted behind the factory grille surround that goes around the headlights etc.

How does this come off??

 

The surround comes off by removing the corner lights (1 screw on top of the light). There will be 2 screws behind each light. Remove the screws on top of the surround. There are also 2 clips on the bottom that can be released by using a long screwdriver.