can't wait to see all the posts from people who have failed to upgrade their PC's in the past five years and are running anything prior to Win98SE - it won't work with those 'cause there was USB 1.0 support at best ;-)
RC, go to the NG forum and you will see it there.
You can choose a different COM port, but are pretty much limited to COM1 or COM2.
Actually it looks at com1 and 2 but if they are in use by other devices and you have more com ports, it will continue looking until it finds an empty port, so it could work with com3 or4 but only if the previous ports are used.
Primo, RC GEEK is correct, the Pronto platform came out in 98, and they must have worked on it before that, back then there was no USB. Supporting USB means a total redesign, and that is what happened with the next generation Prontos TSU-3000 and TSU-7000.