Replace S-Voice with Google Now in 4.1.1?

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http://forums.androidcentral.com – 4.1.1 is out, but the only feature I cared about, google now does not seem to be well integrated. I was hoping google now would replace s-voice, but that is not the case. Is there any way to force this. Primarily bring up google now instead of s-voice when you double tap the home button. (HowTos)