Installing NIS 2009 over Norton 360

Hi

I currently use Norton 360 version 2.5.0.5 and my subscription is over tomorrow (sept 20) 

I purchased Norton Internet Security 2009 at a local store

I want to install NIS as a replacement for 360

My question is should I uninstall 360 completely then install NIS or should I just install NIS and it will override 360?

thanks