plz help

Hello, my name is Arash. I have a brand Dell Latitude D600 and i had to reinstall windows XP Home Edition on it. Now i need to do a couple of things. First, i need to activate windows which shouldn’t be a problem but i had an old laptop that i installed windows on also. So, the key that came with the disc doesn’t work for the activation anymore, is there any way around calling microsoft? Second, my speaker’s drivers went out when i reinstalled windows and i can’t seem to find them on Dell’s website, is there any place i can get them. Please send correspondance A.S.A.P.

Thanks guys,
Arash