NIS 2007 Question

Hello friends at Norton Community,

  I have a question about NIS 2007...  I have 2 laptops that i have NIS 2007 installed on... one laptop is about 2 years old, so NIS 2007 was the current version at the time...  I liked it so much, i installed another copy on my other laptop... now both laptops have NIS 2007, NSW 2007, and Norton Save & Restore 2.0 (NSR 2.0)     I tried twice to install a NIS 2009, upgrade only to be prompted to use that "STUPID" Norton removel tool, that wipes clean away every norton product you have installed..  and after having to reinstall all 3 products again,

(in a very certain order or they would not install properly) i gave up and use NIS 2007 which matches "Perfectly"

with NortonSystem works 2007, and the Norton protection center...  when i click the norton protection center at the bottom of my task bar, all are together in a single user interface...  it is mint!.. 

but here is my question;    Is it o-k to continue to use NIS 2007?..  I know it is not the current 2009 version of NIS?..  all of my anti-virus definitions are up to date... and i always check liveupdate to see if anything else needs updating...    i do full system scans every week or so, and auto protect is always on...  I really didn't like the user interface of NIS 2009...  maybe i'll wait and see what NIS 2010 looks like..

I know NIS 2009 has faster scanning, uses less power, ect, ~but i'm still protected by the same anti-viruses~ Right?..  and i still have a 2 way firewall right?   does anyone else still use (on purpose) older versions of Norton Internet Security?..  Thank you for your answers...

from Philip