AC97 driver update problem

I have an XPe image that works fine. However, if the
user decides to update the sound drivers, I am running
into a problem.

If the drivers (inf and sys files) land in a certian
directory (say, c:\drivers\audio) and an inf install is
attempted from that directory, there are prompts for
missing files (ksuser.dll, ksproxy.sys, drmk.sys,
wdmaud.drv) with the path "c:\drivers\audio\i386", rather
than the correct location of the files. I have
determined one cause for this is a line in the audio
driver inf file:

Include=ks.inf,wmdaudio.inf

Any ideas on how I can work around the prompts without
removing the include line from the inf?