What also helped me allot, is recording the command into the speach library of windows, on its own.
Words like "Hunter mode" (power to engine and guns), "Eject Eject" (yes i have a eject command), i will record as a single word into the Windows speach library.
Helped me allot, with my mumble type of speaking :)
Control Panel->Speech Recognition->Start Speech Recognition, then right click on the menu that came up, and select: Open the Speech Dictionary-> Add a new word.
In that menu i type in the whole command and or the loose words for the command (so i record "Hunter Mode" and "Hunter" and "Mode")
In the next menu, just check the "Record a pronunciation" box, and record the word.
This option worked great for me, never had problems with calling commands afther that.
And lest face it... you wont need the Voice Recognition for something else... so fill up the Library/Dictionary with your commands.