You need to download iTunes 8.2.1 (64-bit) from here: http://www.filehippo.com/download_itunes_64/
Then use this guide to install it: http://yukichigai.googlepages.com/iphonex64
Eugh Yuck XP 64 bit.
That is an icky OS.
Dont think there is one for it, does the 32 bit one not work?