Don't know if this is easy to implement (or if it's worth the hassle).

This is what I think needs to be done to get it in:

1) Copy wmcsetup.exe into SVCPACK

2) Extract wmcsetup.cat (subdir "update\") and place in SVCPACK too

3) Create a file inside SVCPACK called HFINT.DAT with the following in it:

[FixesInstalled]
WMCSetup
[WMCSetup]
ConnectionManager.xml
ContentDirectory.xml
fsdkreboot.exe
MediaReceiverRegistrar.xml
WMC_BW120.jpg
WMC_BW120.png
WMC_BW32.bmp
WMC_BW32.jpg
WMC_BW48.bmp
WMC_BW48.jpg
WMC_BW48.png
WMC_Color120.jpg
WMC_Color120.png
WMC_Color32.bmp
WMC_Color32.jpg
WMC_Color48.bmp
WMC_Color48.jpg
WMC_Color48.png
wmccds.exe
WMCCFG.chm
WMCCFG.exe
WMCCPL.dll
wmcsci.dll
wmfdist95.exe

4) Extract the files mentioned in HFINT.DAT and place them in I386

5) Edit SVCPACK.INF to include:

[SetupHotfixesToRun]
wmcsetup.exe /q /n /z
[ProductCatalogsToInstall]
wmcsetup.cat


The wmfdist95.exe is the same file as the one we're including for the WinXP WMP9/10 codecs. Maybe this one can be omitted (or the other way around).

I think this is everything...

Throw the wmcsetup file into the HF folder and it will be integrated via svcpack. Sorry, I don't plan on slipstreaming this one. If someone wants to write up the code to slipstream it and test it, I'll be more than happy to add it to the script.

Thanks for the reply.
That's what I tried first but it's not integrated. I see that your batch file is trying to find a few files inside it, but fails to find the right one because it's not looking inside the update\ folder. I found this a bit strange because it seems like a regular hotfix-type update to me.
There are no traces of it in the SOURCESS folder after HFSLIP has run.

It's an optional program that'll not turn into a recommended update until everybody owns a Microsoft Multimedia House.

I'm going to try a silent installation from HFSVPK next time.

Have you tried the latest revision? It's not in the svcpack.inf file?

That did the trick. I was using 51115. Thanks.