Custom Support Agreement updates/patches with SCUP

I'm attempting to use SCUP to deploy Windows XP Service Pack 2 patches / updates that the company I support receives for paying for a CSA (Custom Support Agreement).

Don't ask, I can't share the patches.  Sorry.

Importing the CAB generates and "incompatible data" warning and then fails.

Here are the relevant lines from UpdatesPublisher.log

 

import : Starting Import Wizard at Thursday, September 02, 2010 11:11:17 AM
starting import from file: T:\SCCM Package Source\Software Updates\WinXPsp2 Custom\2010-08\CSA-WindowsXPSP2.CAB
Copying file: T:\SCCM Package Source\Software Updates\WinXPsp2 Custom\2010-08\CSA-WindowsXPSP2.CAB to C:\Documents and Settings\user\Local Settings\Temp\CSA-WindowsXPSP2.CAB
In import configuration the digitalsignature check for the file T:\SCCM Package Source\Software Updates\WinXPsp2 Custom\2010-08\CSA-WindowsXPSP2.CAB is set to True
import : Importing from: index.xml
Import : Found invalid data while decoding. InnerException:
import : Found invalid data while decoding.
import : Found invalid data while decoding.
Deleted file C:\Documents and Settings\user\Local Settings\Temp\ebbae76f-3997-4cbc-affb-7062906fb041\index.xml
import : Finished Automatic Import at : Thursday, September 02, 2010 11:11:58 AM
Deleted folder C:\Documents and Settings\user\Local Settings\Temp\ebbae76f-3997-4cbc-affb-7062906fb041\

I do have SCUP working.  I've imported / published / synchronized the Citrix partner catalog and I've created a custom patch.  All the data flows to the SCCM console and looks good.  However, I can't get this to work with the CSA patches.

I have the EXEs and a CAB file.  CSA-WindowsXPSP2.CAB contains

• index.xml
• package.cab
• package2.cab

index.xml only identifies the 2 embedded CAB files

Package.cab contains package.xml which is a 200 kb and contains many details about several patches.

Package2.cab has all kinds of nonsense in it.

Does anyone have any ideas or experience with this?  I'm guessing I'll have to call Microsoft Support, but I figured I would try this first... and yes I've already searched high and low for anything similar.