The way to get around this is to choose "update driver" on the Multimedia Audio Controller in the Hardware panel, and choose "install driver manually." Then install the SBLive! driver embedded in Windows 2000/XP. Restart your computer, and then install the Audigy 2 update. It'll work. You just have to install the wrong driver, initially. Yay Creative for making this so needlessly complicated. Heaven forbid they release driver packs.