This is the Windows 2000 driver. To use in Windows XP you first need to edit the registry key as follows
Edit this entry to read Microsoft Windows 2000.
Now use the Windows XP Program Compatability Wizard and run the 1200cu_w2k.exe file to install the drivers. When it asks you to restart the machine choose cancel. Now change the registry entry back to read Microsoft Windows XP and restart the PC. Your scanner should now work.