I have a usb trackpad that used to be a mbp top - hence it's an 'internal' trackpad (in System Profiler). It works great plugged into any usb jack. The problem is with the wireless usb hub. I can see it in System Profiler but the Mac Pro apparently isn't looking for an internal trackpad in such a place. Is there any way to 'point' it at the trackpad on the usb hub?