Can You Use A Serial Code Number More Than Once On Mount And Blade From Where Can I Download Sims 2 Double Deluxe?

From where can i download sims 2 double deluxe? - can you use a serial code number more than once on mount and blade

Eh! After buying the Sims 2 Deluxe and had the CD and the serial number. Now my cd does not know where they are, but I git the serial number! Can someone tell me where I download the game and enter the serial number? plslspls help. if someone told me that was the site and download and play, I give my serial number! pls help!