Hey,
i have galaxy 3,5801.I had got 2 MINI-CDs with it which has kies in it.
If you hadn't got it,that means your box was opened.You should go the seller where you bought it from and ask him for CD.
Actually connecting galaxy to PC is pretty confusing.Even when i brought the phone i was not able to connect to 1 week,after lot of trying diff options i was able to connect.
PLZ REFER THE USER MANUAL!!!!!BEST SOLUTION OR ASK CUSTOMER CARE