I video of my car at the local race track that I'm cutting up for a project and would like to blur out my license plate tag. In some parts, my car is centered in the video and in others, it's moving around in the frame. How can I go about doing this in Premiere Pro CS3? I'm running on Windows, if it matters. I tried searching and couldn't come up with anything. It's been a while since I've used Premiere so be easy on me. Thanks in advance for any help.