i just bought the ghost recon package and downloaded them off the website and now to play multiplayer you have to have a serial number but i dont have the booklet.. i downloaded it.

I didnt know it was available to download?

Given the age and cost of the game I think your best bet would be to buy a copy on original disc.

The lowest price I have found today is from £1.75 with the full Gold version from £2.25.

Where did you download the game from?