Trouble installing hotfix

[Ian]

Hi, I tried posting this yesterday but it doesn't seem to
have come through...

I am rolling out new systems shortly. For that purpose I
have created an Administrative Installation point for
Office XP. I installed Office XP with the setup /a
command off the office XP Professional CD-ROM, Part No X06-
27636. I downloaded and applied SR1, SR2, and the
relevant post-SR2 hotfixes. I have been able to apply all
the SRs and hotfixes except for KB813617. Below is the
text from the error log:
<BEGIN>
DEBUG: Error 2746: Transform 1TTo1U invalid for package
C:\WINNT\Installer\538c58e.msi. Expected product {901C0409-
6000-11D3-8CFE-0050048383C9}, found product {90110409-6000-
11D3-8CFE-0050048383C9}.
1: 2746 2: 1TTo1U 3: C:\WINNT\Installer\538c58e.msi 4:
{901C0409-6000-11D3-8CFE-0050048383C9} 5: {90110409-6000-
11D3-8CFE-0050048383C9}
The upgrade patch cannot be installed by the Windows
Installer service because the program to be upgraded may
be missing, or the upgrade patch may update a different
version of the program. Verify that the program to be
upgraded exists on your computer and that you have the
correct upgrade patch.
f:\install\officexppro\updates\kb813617\artff.msp
<END>

I have seen these "Transform 1TTo1U" errors as I've
applied other SRs and hotfixes, but they have never been
fatal before. Can someone help with this? I would rather
not roll out new machines with Office XP until I can get
all the patches applied. Also, KB827430 depends on
KB813617 so I haven't been able to apply that hotfix
either.

Any help is greatly appreciated.