SigmaTel High Definition Audio Codec (no audio in xp)

Hey guys, I have literally spent 3 hours trying to fix this sound problem. I am on a intel imac, running bootcamp 3.0 and windows XP. Until today, the machine has performed perfectly, however out of nowhere I noticed the sound stopped working. I then went into my control panel and saw that there was a problem with my audio device. It is having problems with the "SigmaTel High Definifion Audio Codec". I have tried restoring the drivers to a previous state but that did not work. From there I have read every forum I have come across and downloaded various versions of the Sigma Tel drivers to no avail. I even deleted all of the drivers, let windows detect the new hardware, then I pointed it to the original audio drivers off the Snow Leopord install DVD. It installs them, but immediately comes up with a conflict. I have been told that windows might have automatically updated my original drivers with a new version that no longer works. I just want my sound back.

So far I have tried, restoring the drivers, deleting the drivers and re-installing the original ones off the Snow Leopard DVD (that use to work!), downloading the SigmaTel drivers directly off their site, updating bootcamp and running the KB835221.exe, a driver several other people had success with after installing.

This seems to be a VERY common problem, there are threads all over the net, however very few have solutions that are meaningful.