Is there a command to snap a window to the left and right of the screen in Windows 7?
I have searched but not found anything (short of telling it to press Win + Left or Right)?
Or some way to add a command?
There is no Aero Snap shortcut built in to speech recognition and I am not aware of a way to add it / macro it.
You will probably have to do as you said and tell it to do Windows Key + Left/Right.
Maybe Younicate Speech Recognition Commands works for you.
Powered by a sophisticated algorithm, Younicate launches commands from speech recognition without mistake nor training.
Younicate is freeware.