Google Now available for download and installation on ICS AOSP ROMs. It is apparently not working on phones in Asia but users from the US are welcome to download (mirror) and follow the procedure. Follow the procedure by clicking more below.
- Open Root Explorer & navigate to /system
- Now Open build.prop in Text Editor.
- Edit ro.build.version.sdk = 16 & save.
- Now go to /system/app & Rename GoogleQuickSearchBox.apk toGoogleQuickSearchBox.apk1
- Now reboot & install the app from the download link.
- Now edit build.prop & change ro.build.version.sdk = 15 & reboot.