Failed to install KB967143 for Visual Studio 2008 SP1

I need to use Silverlight for one of my project, so I tried to installed Silver Tool for Visual Studio 2008 SP1. But strangely enough, it fails with error code 0x80070643.

By extracting the downloaded file, and set up each components one by one, it was noticed that KB967143 hotfix to VS2008 was the one failing to install. The following event was logged:

Event Type: Error
Event Source: MsiInstaller
Event Category: None
Event ID: 11935
Date: 23/7/2009
Time: 2:01:19
User: x\kenneth
Computer: x
Description:
Product: Microsoft Visual Studio 2008 Professional Edition - ENU -- Error 1935.An error occurred during the installation of assembly 'Microsoft.VSDesigner,version="9.0.0.0",publicKeyToken="b03f5f7f11d50a3a",processorArchitecture="MSIL",fileVersion="9.0.30729.4141",culture="neutral"'. Please refer to Help and Support for more information. HRESULT: 0x80131018. assembly interface: IAssemblyCacheItem, function: Commit, component: {B77A1104-F3C2-4350-AFFB-16EAB249233D}

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 7b 44 37 44 41 44 31 45 {D7DAD1E
0008: 34 2d 34 35 46 34 2d 33 4-45F4-3
0010: 42 32 42 2d 38 39 39 41 B2B-899A
0018: 2d 45 41 37 32 38 31 36 -EA72816
0020: 37 45 43 34 46 7d 7EC4F}

Searched for many pages on the web like this. Even a complete uninstall all components of VS2008 did not help.

I tried to create a thread at the Silverlight Setup & Installation forum but received no reply. Then I created another thread at the Visual Studio Developer Center, and finally got some useful idea. There should be some problem with the assembly manifest of the Microsoft.VSDesigner.dll.

Unfortunately, I have no idea how to fix that yet. Anyone got some idea?