SN, Here's one site for Atheros. You will have to know the chipset though: Atheros Driver Download -- Open Drivers
I'm checking for the Realtek, to see if they are there also.
Are you looking for 32 or 64bit?
Only God, and Toshiba.
Well XP, if you have the SP3 pack will only be good until June or July 2014.
So if ya wanta run XP ya better save any, and all things associated with it now.
If you look hard enough You may still find SP3. If I remember correctly its a 156MB DL.