Based on the same bulk USB drivers which Tim Shuerewegen's USB drivers are based on I am able to present you the GP32 USB Drivers for Windows XP 64 Bit Edition and Windows Server 2003 64 Bit Edition (AMD64). Now you are able to use PCLink also on Windows x86-64 platforms.
GP32 USB Drivers for Windows64
Have fun!
GP32 USB Drivers for Windows64
Have fun!