How do you change trackball color for Blackberry 8100?

I heard there is an application to do this. Does this work for the 8100 and where do I find it?

Thanks!How do you change trackball color for Blackberry 8100?It's called ColorPearl. You can find it at themes4bb.com under 'Free Applications'...thats where I got it from. Works pretty cool...only for the Pearls though!