For some reason it doesn't install on my I9100P stock ICS 4.0.3
Sent from my GT-I9100P using Tapatalk 2
On SGSII you need to be rooted in order to have a CWM and flash this file http://goo.gl/4GyDV from recovery.
More info here: http://wanamlite.com/2012/05/22/mod-hacked-siii-svoice-voice-talk/