It sounds like you are in luck. The thing that you are calling a driver board is most likely a mother board for the Gecko units. The gecko units are what do the hard work. They drive the steppers acording to what the computer tells them. The motherboard? is only for conecting the computer to all the Geckos. It is possible to rewire the geckos straight to the printer port cable. It is possible that the software you are using is designed for the mother board. If this is the case you could buy a program called Mach2 that will then drive your geckos. About $150 bucks. Oh and youll need XP as well.
If you could post a picture or two, that would also help us determine exactly what you have got.
EDIT: Just in case I got your hope up, you must realise that you will have to configure Mach2 and re-learn a few different things. This may cause temporary grief, but not too much.
You may want to look at these two sites
http://www.geckodrive.com/products.htbml http://www.artofcnc.ca/