It appears to me that you will be running 2 different soundcards. The realtech one for your hdmi and the soundblaster for your other audio. You will most likely have to switch between these two depending upon what you want to do. 1st lets fix the 5.1 issue and then we will worry about the soundblaster card. Did you do what my post said and did it succeed in giving you the desired 5.1 output from your hdmi output?