Installing SQL Express Via Commandline

So, I read this thread: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=416220&SiteID=1, which suggested that I could call SQLEXPR32.EXE (the SP2 download) with the relevant commandline args in exactly the same way I could call setup.exe. Namely, if I were to call:




Code Snippetsetup.exe /qb /settings "c:/setup.ini"



then I should be able to use




Code SnippetSQLEXPR32.exe /qb /settings "c:/setup.ini"



where my setup.ini contains




Code Snippet[Options]
ADDLOCAL=SQL_Data_Files,SQL_Replication,Connectivity
INSTANCENAME=AuctionI
SAPWD=auctioni_000
SECURITYMODE=SQL



However, this doesn't seem to be working at all - the commandline params to SQLEXPR32.EXE are completely ignored, and it runs as if they were not specified.



Would be great to get some help on this. I'm equally happy with the set of commands I need to call in order to extract SQLEXPR32 and then run setup, but SQLEXPR32 seems to extract to a random GUID dir, and automatically start setup, neither of which is condusive to automating it.



Thanks,

Dan