[App_rpt] URI configuration help

Hi Everyone, I'm finally getting to "finish up" my URI based project and wondered if someone could help point me to some advanced sample asterisk/app_rpt config files (usbradio.conf, rpt.conf, primarily) for using the URI adapters. I've currently got 1 URI working properly with my TKR-850 repeater. Now, I want to add 2 remote base radios for VHF and HF, do some linking, etc. I, mainly need more info about the syntax to use with multiple URI's, usbradio.conf options, etc. Thanks in advance! David KB4FXC