Sigmatel HD Audio Driver Hell

I've got a Gateway ML3109 with MicroXP on it (slimmed XP w/ sp3) and the audio driver suddenly stopped working with a code 39 error (Windows cannot load the device driver for this hardware. The driver may be corrupted or missing).

The audio hardware is a Sigmatel HD Audio Codec, 8384:7690.

It was working for a month or so before this, and today it suddenly stopped, I'm not sure why. Usually with this error one can just uninstall the driver and reinstall it, but every time I do this I get a code 39. I've tried four different versions of the driver:

5.10.4717.0
5.10.5143.0
5.10.5185.0
5.10.5208.0

And all of them code 39. I got all but 5.10.5143.0 from the Gateway site; 5143 I got out of a BTS Driverpack (Sound B).

Apparently, also, the guy who made MicroXP removed a lot of DLLs and sys files that he didn't think were necessary such as ks.sys, ksuser.dll, etc. I just copied them from my other computer (xp sp2) or from dll download sites. I think this may be the problem but I have no way of getting sp3 versions of those files.

The driver uses these files:

drmk.sys; 5.1.2600.5512 *
ks.sys; 5.3.2600.2180 *
portcls.sys; 5.1.2600.5512 *
sfng32.sys; 9.0.0.54
sthda.sys; 5.10.5208.0
stream.sys; 5.3.2600.5512 *
ksproxy.ax; 5.3.2600.5512 *
ksuser.dll; 5.3.2600.2180 *
stacapi.dll; 1.0.5208.0
staco.dll; 1.0.5208.0
wdmaud.drv; 5.1.2600.5512 *

The files with * I remember downloading or copying from another computer.

Note that for the driver version 5.10.5143.0 (the one out of the driverpack) all of the above * files were included and it still didn't work.

Thanks in advance.

It sounds like a problem with the hardware not the driver.