How To Relpace S Voice With Google Now On Galaxy S III

Prerequisites: Must be running the stock TouchWiz Android 4.0.4 ICS ROM on your rooted Galaxy S III, and that you have ClockworkMod Recovery flashed.
Download files here.
Step 1: Download Google Now .zip file. Transfer it to directly under /sdcard on your S III.
Step 2: Reboot into ClockworkMod (CWM) Recovery Mode. You can do this by shutting down your S III, and then pressing and holding Volume Up + Home + Power buttons until you enter CWM.
Step 3: Navigate to install zip from sdcard > choose zip from sdcard > [file you transferred in Step 1] to flash Google Now to your S III.
Step 4: Select reboot system now from CWM’s main menu.
Verify if Google Now is installed by looking for an app named Google in your apps drawer.
Step 5: Install and set up Google Latitude on your Android device.
Step 6: Launch and completely set up Google Now from the icon in Step 4.
Step 7: Go into the settings for S Voice and deselect Launch S Voice.
Step 8: Install home2 shortcut from Google Play.
Step 9: Press your S III’s home button twice and select Voice Search to launch Google Now. It should display a blue microphone. Follow on-screen instructions.
Step 10: Launch Google Now once again from the icon in Step 4. Press the menu button and tap Refresh.
Step 11: Reboot your phone.