Upgrade to NIS 2012 after using reg key in 3 existing NIS 2011 installations?

I purchased a retail copy of NIS 2012, but used the key in my existing 3 installations of NIS 2011 because I wanted to wait a bit before installing NIS 2012. I’ve decided to install NIS 2012 on one of the PCs and need to know what I have to do. If I uninstall NIS 2011 from the control panel, will the key transfer over to 2012 or will I have to contact customer service? I assume if I were to use the removal tool then I would be required to contact customer service. Also, NIS came in a bundle with Norton Utilities 15, should I install NIS first, then NU? Thanks, BGC