Montego Vista drivers do exist. Kindof...
When I did the last clean install of Vista for a new machine with the Montego DDL card
here is how I got it to work...
1) After loading the OS, do a Search Online For Driver to get the windows update driver
2) go to the CMEDIA forum and download the Vista Beta driver (top of the PCI Audio forum sticky) for the 8768+
3) install the driver using the setup file in the download
4) Open the CMI Media control panel applet and configure.
I am using this with a DTS/DD decoder and am using the optical output to the receiver.
To get this to work properly I had to set the default Playback device to the analog line, then go into CMI applet and set for SPDIF Out and 5.1 speakers. Also select for Dolby Digital Live, not 48khz.
Works like a charm and encodes to the receiver as Dolby Digital on the fly.
Only problem I have is in Media Center.
If I do a speaker setup and select TOSLINK and 5.1, the test tones did not work, to bypass this I setup speakers to RCA Mini Plug (headphone plug) and then set for 5.1 and all was fine.
You may have to play with the Speaker applet and the CMI Media applet configurations, depending on your setup.
N3M3515