Subscription Renewal

I currently have NIS 2009, 3-PC license, soon to expire.  One pc is located in another town.  I just purchased the NIS 2010 disc, 3-PC license. I will not be able to transport the disc to the third pc before expiration of my subscription.  If I renew the subscription on the two pc's that are in the same residence with the disc, can I renew the third pc subscription simply by using the "Renew Now" function on the application window and entering the product key, or do I need to use the disc on all three pc's?  If you can use the product key, do you get all the new features in NIS 2010?

Thanks!