To uninstall and reinstall sharepoint 3.0 on SBS2008

To uninstall sharepoint 3.0 on SBS2008, please follow these steps:
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Step 1: Uninstall WSS3.0:
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Disable and Stop the following services
-Windows SharePoint Services Administration
-Windows SharePoint Services Search
-Windows SharePoint Services Timer
-Windows SharePoint Services Tracing
-Windows SharePoint Services VSS Writer


Note the following registry keys:
From HKLM\Software\Microsoft\Office Server\12.0
-InstallPath (default is C:\Program Files\Microsoft Office Servers\12)

From HKLM\Software\Microsoft\Shared Tools\Web Server Extensions\12.0
-Location (default is C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12)

Delete the following registry hives:
HKLM\Software\Microsoft\Shared Tools\Web Server Extensions\12.0
HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\WSS

Delete the following folders:

The value of the InstallPath key (default is C:\Program Files\Microsoft Office Servers\12)
The value of the Location key (default is C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12)
C:\%CommonProgramFiles%\Microsoft Shared\SERVER12


Step 2: use Windows Installer cleanup:
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This utility is to clean the product code information:

1. please download and install installer cleanup utility from this link:

Description of the Windows Installer CleanUp Utility
http://support.microsoft.com/kb/290301

2. please run these commands after you have installed the utility:

Cd c:\program files(x86)\windows installer clean up\
MSIZAP TW {90120000-1015-0409-0000-0000000FF1CE}
MSIZAP TW {90120000-1014-0000-0000-0000000FF1CE}
MSIZAP TW {90120000-1110-0000-0000-0000000FF1CE}

3. please reboot server.


Step 3: reinstall Sharepoint 3.0:
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1. save the following into notepad, and then save as a REG file.

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\ServerLanguage]
"1033"=""

2. double click the REG file to import the registry.
3. Please reinstall sharepoint 3.0 according to this link:

Reinstall Windows SharePoint Services
http://technet.microsoft.com/en-us/library/dd548327(WS.10).aspx