1. Install Link2sd v2.0.2 from market.
The updated version allows you to convert system application to user apps. Thus, pre-install games can now be move to be user apps.
2. convert pre-install apps to be user apps, and create link to the application.
you will notice somehow an increase in the available internal memory.
I hope, I help somehow..
I apologize if others can't follow my information above. I included here the more detailed instructions for using link2sd, please see link :D