are you asking about all the mesh or just the oval? the rear is the easiest to do. the bottom front is easy too, you just need to remove your splash guard. the oval....well your gonna need some basic skills to do that.
Use screws. Best method...my stazi gen2 mesh is rock solid (i used screws through the tabs- screw the screw halfway in the tab so theres an equal amount on each side and it wourks mint. Make sure you push the mesh as close to the bumper as you can and screw as close to it as you can so it cant rattle/move between the bumper and the screw