How to create an installer for deploying Sql Server Express

Hi,

I have created an installer for deploying Sql Server Express. My installer will start the process of installing Sql Server Express. However the installation of SqlServer Express will fail because it says another installer is currently running (which is my installer). Is there anyway to work around this problem?

The reason why I would like to create an installer for the installation of Sql Server Express is because I would like to configure the SqlServerExpress without the user fiddling with the ini file.

Thanks

Theses sources should help:

SQL Server 2005 UnAttended Installations
http://msdn2.microsoft.com/en-us/library/ms144259.aspx
http://msdn2.microsoft.com/en-us/library/bb264562.aspx
http://www.devx.com/dbzone/Article/31648

Deploy Database with MSI
http://msdn.microsoft.com/msdnmag/issues/04/09/customdatabaseinstaller/

Deploy Database with Application

http://www.codeproject.com/useritems/Deploy_your_database.asp