Hey all, I need a little help with this application..

I did a little research and found on the 8100 you could change the color of the trackball. Does it work with the tmobile phone? I downloaded the app, but when I tried to run the blackberry desktop app loader it said no files were found that went along with the bb..Can some one please help me out? The websites where I found the app do not provide help..they just show videos of the light working...and also instructions how to find it in the phone..but no help with downloading on the desktop and loading into the blackberry device.

Please someone who knows this device, help me out