Installing NIS 2011 from Disk

Vista Home Premium 32 bit with Vista SP2

IE8 browser

 

OO I know I'm asking lots of questions about installing NIS 2011. I thought posting each issue/question seperately would help me keep things straight

 

I currently have NIS 2010  installed. I have purchased NIS 2011 froman actual retail store (Wal-Mart) and have the actual disk.

I know when I went from NAV2008 to NIS 2010 I used the Norton Removal  tool. But I was jumping over a year when I made that switch. At this point I am not skipping any years (2010 to 2011)

 

So I have been told that there is no need to use the Norton Removal tool. That I can just install NIS 2011 without first removing NIS 2010?

 

Wondering if this holds true when using the disk to install NIS 2011?

 

If I appear a little panicked, is because I'm switching in the next day or two

 

Thanks in advance