I'm a bit surprised about the result. Looks like there is different behavior in different versions of windows.
Works fine in Windows 7 64bit:
The Device manager adds a #2 to the second camera and Yawcam uses the name reported in windows.
I thought Windows 7 32bit should have the same behavior, but it doesn't:
The Device manager has the same name for both cameras and Yawcam uses this name as it is reported by windows.
Also note that the reported name differs between the 32bit and 64bit of Windows.
I'll see if I can try some more versions of Windows.
kvrajan which version of Windows are you using? What camera are you using?