|If you can find Win XP driver for your soundboard, you can use it for Vista and Win 7 as well.|
But unfortunately, the drivers for Win XP were removed from Ess Tech web site several months ago. Still you can contact ESS people for it, I guess:
Also check this: http://www.opendrivers.com/companyd...
When you get the drivers, unzip the contents and use Driver Update method to install instead of running the setup.exe.