[LAU] linking soundcards

Hi I'm building a live performance using chuck. We need to have both click + the actual audio produces, routed to either a headphones mixer or the PA. I could of source live with mono and pan the click to one channel and the music to the other, but stereo is better... The problem is twofold: 1) Can I link the onboard soundcard and an usb soundcard so that they appear to the system as one four channel device? 2) Can I address each of these outputs (or sets of stereo outputs) from chuck? BTW: I don't need super low latency and I only need playback. The laptop is gonna be an IBM x61 running ubuntu and the usb card is an Edirol UA-1A. Thanks in advance for any response! -- peace, love & harmony Atte http://atte.dk | http://myspace.com/attejensen http://anagrammer.dk | http://modlys.dk