ASKING IF THERE ARE ANY WAYS ON HOW TO REPARTITION RAM from Internal Memory???

I got this procedure from a group in FB wherein i have done repartition (getting memory from internal to RAM)

Example: BEFORE = Internal 16GB / RAM 1GB
AFTER = Internal 12 GB / RAM 4.5GB

I have actually done this on my other android phone, but apparently the flashable source cannot be used from samsung galaxy s3..

Something like that.... do anyone know how to do this on samsung galaxy s3?

I hope anyone can help...

Thanks a lot!