Instaling SQL Server Express 2008 from command prompt

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SQL-Server

Hi,
I am trying to install SQL Server 2008 Express from commmand prompt with following parameters,

start /wait SQLSrv2008X86.EXE \QS instancename="ERPTesting" SAPWD="ezi587RTC" INSTALLSHAREDDIR="C:\Program Files\Microsoft SQL Server2012EZI" INSTALLSHAREDWOWDIR="C:\Program Files (x86)\Microsoft SQL Server2012EZI" INSTANCEDIR="C:\Program Files\Microsoft SQL Server2012EZI" username="Furqan" companyname="Ezi" AGTSVCSTARTUPTYPE="Automatic" ASSVCSTARTUPTYPE="Automatic" COMMFABRICPORT="0" SQLSVCSTARTUPTYPE="Automatic" TCPENABLED="1" NPENABLED="0" BROWSERSVCSTARTUPTYPE="Automatic"


The problem is, the installation is not quite, it needs user intervention at several stages.
I need the installation to display progress only, without any user intervention.
Please advise.
Thanks