I am not sure about this, but I would recommend using the latest creative drivers for your card, the new ones that include openAL support are so stable that I am finally glad I bought a creative soundcard... now if they could just do something about the stupid control applications. Audio Console is nice but it can't control speaker levels, sub redirect, thx adjustments, level adjustments, or even the equalizer on my Audigy 2 ZS. I still have to use the older control panel to do all of these, at least all of the AudioHQ's functions seemed to have been ported to the console(Headphone, decoder/passthrough, bit accurate mode, and sampling output), because I hated that application since its inception.
Does using the audigy 2 drivers gain you more features or something? I have not really looked into the audigy 1... I didn't buy it because I never buy first generation products... especially for Creative...