This works perfectly!
The instructions were crystal-clear, everything downloaded and installed flawlessly, and here I am 10 minutes after starting the procedure, listening to "The Spectrum" on Sirius, using my Storm and the included headphones.
For those of you having problems, I'm using XP SP3, a 3.4 Ghz processor, Sirius, and the codec issue never happened to me. It just....worked!
Thanks...you sir, are a total genius!
p.s. the audio quality is AMAZING!