i do it this way...
1. pop the hood
2. move how ever much foam stuff on the other side of your hood out of your way
3. you will see the two silver things(back of the roundel) sticking threw the 2 holes.. just push on them and out comes the roundel.
4. close your hood (1st make sure you put the foam stuff in place that you moved out of the way) and push the new roundel in.