Hello
There is no service pack out yet for Windows XP x64. So, at the moment there is no such thing as Windows XP x64 SP1.
For Windows XP, service pack 1 came out about 6 months after XP went live.
Windows XP x64 has all the fixes and features up to and including Win XP service pack 2. It is actually possible that if Win XP x64 does not need all that many big patches, that no service pack will need to be released.
Crashes have lessened in FarCry64 - it might actually be over before xmas.
Latest problem software is Photoshop 7. I was trying to help create a CS:S spray logo. Created the graphic in the Gimp2 and 'cos Gimp2 can't save in a Targa format that CS:S likes, I tried to get PS to take the image and save as Targa 24 bit. Just kept crashing. Managed to get a spray logo into the game in the end, with no thanks to about 80% of the totally wrong tutorials/tips out there in webland.
Cheers
snedger