Use the slipstream procedure to update SQL Server 2008

http://support.microsoft.com/kb/955392

Use the slipstream procedure to update SQL Server 2008

This method allows you to update the entire product when you run the SQL Server 2008 Setup program after following one of the following procedures:
Procedure 1: Basic slipstream steps

Follow the following steps to create a slipstream drop that you can use for installing the original media and a service pack at the same time.
Install the following prerequisites for SQL Server 2008.
.NET Framework 2.0 SP2 for SQL Server 2008 Express Edition
You can obtain the .NET Framework 2.0 SP2 from the following Web site in Microsoft Download Center:
http://www.microsoft.com/downloads/details.aspx…
.NET Framework 3.5 SP1 for other editions
To download and install the .NET Framework 3.5 SP1, visit the following Microsoft Web site:
http://go.microsoft.com/fwlink/?LinkID=120550
Windows Installer 4.5
To download and install Windows Installer 4.5, visit the following Microsoft Web site:
http://go.microsoft.com/fwlink/?LinkID=49112
Download the service pack package that matches you system architecture. For example download the x64 package of SQL Server 2008 Service Pack 1 if your system is an x64-based system.
Extract the service pack by running the following command:
SQLServer2008SP1-KB968369-x64-ENU.exe /x:C:\SP1
Run the service pack to install Setup files on the computer. You will receive a Setup Support Files dialog box if the Setup support files have not been installed. You can also run the following file to install the setup support files:
C:\SP1\x64\setup\1033\sqlsupport.msi
Run the Setup.exe file from the SQL Server 2008 source media by specifying the /PCUSource parameter. For example:
Setup.exe /PCUSource=C:\SP1

Thanking you,

Best regards,
Udaysinh C. Vaghela
uday_oman@hotmail.com