How do you get the trackball for blackberry pearl to change colors??

I have a downloaded mac version for blackberry pearl but i still cant figure out how to get the app for the trackball color to change. How do I do this?How do you get the trackball for blackberry pearl to change colors??ON your phone browser go to pinstack.com and on the search button type in color pearl ota(over the air) and it will take you to the site and just download it. You have to register but its free and has many things to do.(for pinstack) the direct site from your phone is on the bottom...click ota install when you get there.....:]