I put quite some effort in figuring this out, therefore I would like to share it

I spent two days almost exlusively on this problem until I figured out solution.
The problem was how to get to playback DTS wav files. All the time I was getting just two channel sound instead of 6 channels or white noise. Apparantly this problem is related to architecture of SB Audigy ZS card which I happen to have (lol I maybe wrong with such statemant, coz I have no clue about technical/hardware stuff)
ok! here it goes..
1) to listen to DTS wav format - the files should be written on cd-r in audio format OR should be created as audio cd image (Im using Nero cdburner). I personaly prefer image files, much more convenient imho.
1a) switch to soundcard decoding through Audigy control panel (my mistake was to try to use S/PDIF passthrough and use the external decoder which is built in my speaker system - logitech z5500)
1b) switch settings of soundcard and speaker system to "6 channel direct" (insted of "digital out/coax")
1c) mount a DTS audio image on virtual cdrom (Daemon tools etc) and play it with Creative Media Source Player which comes with Audigy installation cd (alternative may be VLC player, but I didnt get it to work)
the problem wath that I tried to apply same pattern of settings which I need to play DVDs or AC3 encoded movies to get DTS or DD sound
the only problem with my solution is that every time you would like to change from listening DTS format music to watching a movie, you have to reset decoder settings (soundcard decoding to S/PDIF passthrough) and change speaker system settings (from 6 chan direct (analogue) to digital out (digital/coax))
may this postl find the people who are in need for it!