Audio output selection

[parsona]

I have just bought a Hauppauge PVR 150 MCE for my HTPC, and I have plugged it in to an Asus M2A VM HDMI motherboard (690G chipset). This motherboard has 3 ways to output audio, S/PDIF, analog, and via HDMI. I'm running Windows Vista Ultimate. I'm connecting my satellite decoder's audio output to the PVR150. Video and audio is output to my TV via HDMI. I'm running Windows Media Center, and when I'm playing the satellite source, I do not get any audio. From the volume control panel, I notice that the satellite audio is being outputted only through the S/PDIF channel. How can I change this satellite audio to output through HDMI, or better, how do I select which audio out I want the satellite audio to be channeled to? Can I have the audio output simultaneously to all audio outputs?

Thanks!