Sorry, the document of speech recognition feature (Voice Command)
is only available in Japanese.

It is because Japanese version of ViaVoice must be installed on 
your system and voice commands' pronunciations must be Japanese.

If you can speak Japanese and you have Japanese ViaVoice,
read the "Voice_JPN.txt" file in this directory.
"How to use speech recognition and some tips" are written in it.

But with no guarantee!!!
I've only tested with Japanese Windows and Japanese ViaVoice.
Use this feature at your own risk!!!
