Download it
Unzip it to a directory such as c:\sound
go into device manager and find the sound device and click on the driver tab to update the driver, pick your own driver and browse to the c:\sound directory and point to the MGXSB16.inf - when you get the list up select the "Creative Labs Soundblaster Plug and Play" Device

Reading this - its an NT driver - it should work, but XP will complain all the way and you will have to force the install.