Looks like the radio version you are looking for is here...
http://forum.ppcgeeks.com/showthread.php?t=5964
If your 6700 reset after the radio update, you might just need to make a change via a registry editor...
Find the key (if it exists on your 6700)
HKLM\COMM\TCPIP\HOSTS\HOSTS\HTC.ACCUWEATHER.COM
Delete this whole key, then soft reset. Wait a little before resetting so the change sticks though.
Tomn8tr