Hi man,
I just was going through old threads on the forum and saw you had asked about the front license cover. If you haven't figured it out yet, there are 2 screws on the bottom of it that you can only see by laying on the ground or having the car up in the air. Those can be tightened, but if it's rattling, it's probably because there are 2 tabs at the top that slip into slots on the body, and those can no doubt wear over time and allow the thing to start rattling.
I just typed a long message to ya, only to find your PM box is full, so delete some stuff so folks can talk with you!

Best regards,
...z