Force WM codec installation on Windows Server 2003

[Veazer]

I'm trying to install the Windows Media 11 codecs (WMFDIST11-WINDOWSXP-X86-ENU) on a Win2K3 server box used that will be used for encoding video. Unfortunately MS does not officially support the codecs on Win2K3. Some people reported that they got it to work by running setup in XP compatibility mode, but it has no effect for me.

If I try to install, I get the message "The version of Windows you have installed does not match the update you are trying to install."

I edited update.inf and changed

MaxNtMinorVersionToUpdate=1
MaxNtMajorVersionToUpdate=5
NtBuildToUpdate=2600
NtMinorVersionToUpdate=1
NtMajorVersionToUpdate=5
MaxNtBuildToUpdate=2600

to

MaxNtMinorVersionToUpdate=2
MaxNtMajorVersionToUpdate=5
NtBuildToUpdate=3790
NtMinorVersionToUpdate=2
NtMajorVersionToUpdate=5
MaxNtBuildToUpdate=3790

After the modifcation, installation begins, but quickly ends and reports:

"Setup could not verify the integrity of the file Update.inf. Make sure the Cryptophic service is running on this computer."

I assume there is some hash/checksum check on the .inf file that is failing because of my modification. Is there a way to force it to ignore this and go ahead with the installation?