Lots of questions about this, without alot of pictures or step by step for people who are still a little scared or unsure about doing this for the first time. So I hope this helps a little
First- You're going to want to pop all the tabs off of the top plastic piece like so. Just run your fingers beneath the plastic piece on each side and pop off all the tabs. Really nothing to it.
Second- Use a screwdriver or something similar to either push up, or push down the silver tabs to pop them out of the upper plastic piece. You will see these tabs if you look down the vent on the right side, or if you pull the grille slightly towards you, and access them from the back(which I did). As you pop the tabs out, pull on the chrome at the same time and give it a good tug to pop them out. I start on the far right and pop off the first 2 tabs with a screwdriver while pulling on the chrome grille face simultaneously.
Third - Once I get the first 2 or 3 tabs popped off, I grab the chrome face from the bottom and pull on it starting from the corner, and pop the bottom tabs off. Just give them a tug and they all pop out really easily. Just work your way across the grille.
Fourth - After I have most of the bottom tabs popped(I leave the bottom left still in), I move back to the top and pry off the other tabs by pulling on the chrome grille face as before. By this point, these tabs are just poppin off pretty easily.
Fifth - Okay, so you're pretty much home free. Grille should be hangin' on like this. I'm sure by now, you'll know what to do next. Pop the last corner tabs out and pull the grille away from your Jeep. Enjoy
Tip: When popping the top tabs out, LOOK at which way the locking stub is facing. If the tab is hooked on the top, PUSH it down to release(while pulling the grille face). If the tab is hooked from the bottom, PUSH it up from the bottom(while again, pulling the grille face).