i dont think the ipac will do that. i wanted a utrak and mouse buttons on my panel, so i bought the utrak without the optional isb onterface(since it doesnt support mouse buttons) and the bought an optiwiz from groovygamegear. they are very cost effective, i had no problems getting my utrak to work with it, and best of all, it supports up to 3 mouse buttons.
its a shame that utrak usb interface doesnt support mouse buttons..if it did, i wouldnt have had to look elsewhere.