It's been looked into, and it's not possible.
No, it's not just a parallel port driver. It actually does a lot of the work for Mach3.
It actually acts somewhat like a virus, and actually has control over the operating system at very low levels. I don't have the knowledge or ability to go into details, but from what I understand, newer operating systems (and 64 bit versions) don't allow the "driver" to do what it does on older 32bit operating systems.