Vista - Realtek ALC 850 drivers

Im having some trouble with my drivers here with beta 2.

Ive gotten several drivers to work but all seem to have problems.

My old drivers worked but windows kept saying it wasnt for windows vista
(kinda figured that) and it had some strange crackling/pops/hissing going on

nVidia drivers for vista beta 2 work fine (obtained via the update drivers
option)
Except: for some reason they wont allow me to change from stereo to 5.1 or
any other option for that matter, leaving me with only stereo.(YUK!)
So that's a no go as well

Realtek ALC 650 vista beta drivers work perfectly EXCEPT
When playing music in windows media player 11 the side speakers dont play
any sound.

so back to 2.1 during playback, however the test button in the audio options
DOES work.... strange.

Also while playing music in media player the configuration tab in the audio
device properties dialog disapears.


I have also tried the realtek ALC 880 drivers and am unable to install them
because of error:
"Microsoft Bus driver should be loaded into your system before installing
Realtek HD audio driver!"


I'm realy at my wit's end here as no drivers exist for my specific hardware
(although supposedly the drivers are the same for alc650 and alc850)
If anyone can help i will be very happy,
thanks and sorry about the long post....