I bought BG:EE only because it suppose to include Classic BG, but i dont see it in my library or in the game files. i assumed it would download together and i could choose wchin one to play after launching but no. how do i play the original BG? :s

I think it's only the claim code that expires - they can't deny you the rights to play the game once you've claimed it.
(To be safe though, I'd download the installer and back it up a few times ;) )

Edit: Nothing on the sales page indicates a time limit, so no, it wouldn't be legal to add that after the sale).

oh yeah that makes sense. thx :)