If you want that Autovoice can recognize commands without Google now integration, you have two ways to do it:
1) Enable Auotvoice continuous mode. In this mode AutoVoice will get the ability to "listen" commands being active in background. Be aware: this mode could drain your battery.
2) Create an Autovoice Recognize Actio shortcut in your home page. You must to click on it in order to have Autovoice starting listening your commands.