From where can i download sims 2 double deluxe?

hey! i once bought the Sims 2 double deluxe and had the cds and the serial code. now the cd i don't know where they are but i still git the serial code! can anyone tell me from where can i download the game and enter the serial code? plslspls help. if anyone tell me the site and i download it and i begin play it i will give him my serial number!!! so pls help!!