1st. are you sure this scanner has a Parallel Port interface? The reason I ask is most 600 II CD's I've had occasion to deal with all have SCSI interfaces. Plugging a SCSI interface scanner into a parallel port will destroy both the scanner and the parallel port you plug it into creating an inexpensive paper weight.
2nd. If it does have parallel port interface, you will have an impossible task because Windows XP does not like (nor get along well with) Windows XP. You need a newer USB interface scanner to work properly in Windows XP.
There is a Windows 2000 driver posted here for a scsi interfaced 600 II CD scanner. If you wish to try it, you can find it here:
Mustek has been out of business for several years now.