SQL Express Silent Installation.

I am writing an application that requires SQL Express to be installed alongside.

So I try to do the following - Before installing my application, I pop-up a link which leads to "SQLEXPR.exe ADDLOCAL=SQL_Engine INSTANCENAME=MSSQLServer <other parameters> /qb " .
But this displays only a basic GUI, which means that the pre-requisite checks for SQL express are not displayed to the user. So if MDAC version 2.8 is not present on the system the installation of SQLexpress fails without any error messages (except in the log files).
( This is not a problem with all pre-requisites :: If .NET is not present on the system, the failure is much more elegant. There is a nice GUI pop-up which requests the user to install .NET 2.0 before installing SQL express.)

On the other hand, If I remove the "/qb" switch, I can get the pre-requisites GUI to display and the end-user can figure out the cause of failure easily enough. But this means that the optional parameters I use, for example the instancename or the authentication mode will not be used during the install

Is there a good commandline switch I can use so that
1) The pre-requisites check screen is displayed
2) All the commandline options are used for installation.

Thanks