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.

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