well i got mine put on over the weekend. oh my god what a pain.
i used the butter knife method.
for me this consisted of ramming a screwdriver into the tabs, prying them up, and forcing a butter knife through the very tiny gap the screw driver gave me between the grill and grill surround. it's not pretty or subtle. it takes less effort to open a can of beans with a with a spoon than it does to shove that butter knife through that microscopic gap.
that whole tap the knife in and soften the edges thing... yeah that wasn't working. the ledge was just too big to "push" past.
anyway, get enough tabs wedged open with enough butter knives, you pull... well no you don't pull, the wedged knives make it all incredibly tight, you go get your plastic pry set, and start gently and evenly prying on this stubborn piece of plastic. and then it happens. the plastic grill surround will explode into your face. the gently prying, reaches the point where the tabs spring loaded tension, very violently throws the grill surround at you. it startled me so bad i fell off the ramps i was using as a seat.
i didn't get hit though, because i only brought out 3 butter knives with me. so i did the grill in sections. this was good and bad. good because i didn't get smashed in the face, but bad because the last 2 tabs, were completely in accessible with the rest of the grill flopping around all willy-nilly. i said screw it and just pulled like whipped mule. the last 2 tabs made the loudest noise ever when they finally gave in.
didn't seem to hurt anything. i managed to put 2 light scratches in the textured plastic by the grill on top of the bumper. but they're light and it's textured... once the sun gets hot, they'll go away. no worries.
being satisfied with that, i pushed the black one in. you have to push like hell to snap the new one in. again the last two tabs made a VERY loud pop when they were finally seated.
here ya go.
the butter knife method is stupid. it's a hot mess of an idea and should not be attempted by the sane. however if you do... in hindsight, if i were to do this again, i'd use a butter knife for every tab. possibly even grease them. and start on the bottom, not the top. but it's going to fight you every step of the way no matter what.