Upgrade from NIS2009 to 2010

Hi everyone...

 

I have NIS2009 installed. It has 116 days of subscription left. I would like to upgrade to NIS2010 ( available for free).  I also have a brand new boxed CD of NIS2009( never activated).

 

Should I wait for the currently installed NIS2009 near the expiration date and then use the activation key from the new NIS2009 to get anoter 365 days and THEN upgrade to NIS2010 or can I upgrade to NIS2010 now and then when that nears the expiration date use the new activation key from my boxed NIS2009? Will the NIS2009 unused activation key work with NIS2010 when it nears expiration if I get the free NIS2010 upgrade now ?

 

 

thank you in advance for your help.......

 

 

bulajap