For anybody who is interested in disabling rsap on their galaxy s3. I managed to successfully get my nokia 616 kit to connect via hands free mode by rooting my device, then using the rSAP Installation App to disable the native rSAP (went through the normal process of installing the system files as per http://www.android-rsap.com/installation.html
That was it. The native rSAP is disabled to make way for the Bluetooth SIM Access Profile app, which you don't want to install if you want rSAP disabled.
Then all you need to do is install the Bluetooth Phonebook app so that the Nokia 616 can download your contacts and you're all done, you may need to restart your phone and delete all the existing pairing, but all in all works like a charm