How to incorporate the SQL Server Express installer in my own setup?

I want to publish an application which has these requirements:

• .NET Framework
• SQL Server 2005 Express

I'm using the 'Setup Project' in Visual Studio 2008. I have added my project files and it has successfully detected开发者_开发技巧 the .NET Framework dependency.

The problem is:

• I want to include all the files (.NET Framework and SQL Server Express setup files) with the installer.
• I want the installer to first check and see if the required files are installed on the target computer.
• I want to add SQL Server Express installer to the dependencies so that the installer sets up .NET Framework and SQL Server Express automatically on the target computer if needed.

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Check out this one: Include another MSI file in my setup project