I think it will be a useless howto at this stage since the user will be able to connect to ISP but will not be able to use the new interface. I will keep trying to get SMEServer to recognize the new interface, if I succeed, I will provide a complete howto. I hope the developers at least add another list for the interfaces includes: ppp0, ppp1, nas0, nas1, tun0, tun1, tap0 and tap1. These are the interfaces that I know that USB modems use.