try alternate command mode, and i think their is another option to reduce the voice prompts in the settings, should get it down to three steps...
settings-> others -> voice reconnition
from there you can train all the commands to your voice to make it more accurate also.
alternate command mode allows you to say what ever command you want when you first press the voice button, and you dont have to follow the menu driven options.
for example you can say "call home", then comfirm home, then say dail.
if you have the lastest software update, you will see an option for the "home, mobile, other, etc" number after you comfirm the person you want to call. So test to see if you have the call waiting feature, if you dont, you have old software. the dealer will update you for free. here is my post letting people know about the update
call-waiting-update-for-the-2010-2011-g ... %20waiting