Hi, I have both HL2 (the one that came with CSS) and the Orange box. Now after previously installing the Orange box, steam shows in my games list HL2, EP1, EP2, Portal, TF2 and Lost Coast. I installed HL2 from that list yesterday, but I want CSS as well. I thought I'd install HL2 again from my HL2 disc (which comes with CSS). The game installed, now I have CSS in the list of installed games too, but when I double click on it, it takes me to the "buy CSS" steam page. How can I tell steam that I've already bought the game!?