Notes and known issues:
- This driver release supports both Matrox Parhelia 128MB and 256MB boards only.
- Please uninstall your current drivers using Microsoft Add/Remove Programs before installing the new drivers. Do not uninstall your current drivers if you have Matrox RT2500, Matrox DigiSuite or Matrox Imaging products installed in your system.

http://www.matrox.com/mga/support/dr...10400078_p.cfm