How can implement a SopC System in the DE2_TV example?

Hi all

How can implement a SopC System in the DE2_TV example?

I would make a cpu in niosII that communicate also with the sdram for Image Processing.

Can i implement the sdram controller in SopC and control the extern sdram from both site, 1. the sdram controller existent in the DE2_TV example and 2. the sdram controller in SopC System?

Maybe i must make a MUX for activate from witch part i will control the sdram?

Sorry for my english, is not the best... ;)

Thanks