NBRT (3.0.0.66) vice (3.5.0.23)

I hope ya'll are as confused as I am with the title I used.

 

Here goes, I purchased NIS 2010 on line from the Norton site and followed the instructions to make an ISO copy of the NBRT.  Itis version 3.0.0.66.   I have of course upgraded to NIS 2011 (18.6.0.29).

 

Now on my newer Win 7 system I am running NSS version 5.1.0.29 and was sitting here fat, dumb and happy knowing I had the NBRT from my NIS 2010 handy.  Then someone asked  a question on the Comcast Forum about the NBRT for NSS.  I'm thinking the NBRT is not different for different Norton porducts.  But being curious I went ahead and did the "burn" a cd/dvd NBRT from my NSS install.  Low and behold, I now have a CD with an ISO version 3.0.0.66 from NIS and a DVD with a version 3.5.0.23 from NSS.

 

I also noticed when I burned the DVD from my NSS that there was an option for the use of a USB an that the USB had the ability to have the definitions updated (on the USB).

 

So being an ol' fart and not totally understanding the entire procedure, I have some questions:

 

- Could I in fact use either cd or dvd on either of my Norton products?

 

- Do I have to burn an updated cd/dvd from time to time and when will I know that I must do that - especially if I do not frequent the Norton forums to keep up to dateon the latest news?

 

- Would I be better off using a USB devie so I can update just the defs from time to time.

 

- Will the cd/dvd update the defs before running it, even if I do not have the most curent version? 

 

Any help will be appreciated and I thank you in advance for it.

 

BTW - if I missed this info being available somewhere - just point me in the correct direction and I'll be glad to research it on my own.