If program starts on USB connect then program is looked like a virus :)
Without additional soft at each computer or special OS support it is impossibleto autorun application.
Anyway starting from XP SP2 OS allows you to configure autorun via specific system file 'autorun.inf'. (this feature can be disabled at system, you should check first)
So create in root of your USB file 'autorun.inf' and configure it to start ME (add the following text with pathes to me):
Close file and try to reconnect usb.
Thanks for feedback,