I have 2 questions Please Help its about activation?

I bought Norton Internet Security 2010 version of the box, but the sticker where is the product key reads

DO NOT LOSE THIS PRODUCT KEY
must use it when you install this software
This product will stop working in 15 days if it is not activated with the key below

then my first question is this key is new, but I still have 89 days remaining, I want to use this product key until I finish the 89 days, I run the risk of losing this key or not in 15 days?

and the next question is in this version of Norton that came to buy a dvd disc, this CD brings the utility recovery tool I can use it with the key 89 days or not?

Thanks