Dear John.
AFAIK, that is the only to do it. Unless your willing to switch to MSDHCP
Maybe I file a bug report on that.
(win$). Just currious, why do you need to have 2 different ips with from a different subnet assigned to one client?.
As mentioned before, one is a private LAN and the other one ins a public WLAN. Sometimes it fits to just connect to the public WLAN to get internet access.
Best Regards Marcus