MSA2312 MPIO command line install

[Dan_DRS]

I'm in the process creating an unattended install for a Windows 2003 server that includes connectivity to an MSA2312fc. I have close to 100 of these to deploy, so I need to make this as easy as possible. The problem I'm having is the MPIO drivers and SES drivers hang when being installed via a command line (with or without silent install). When executing via the Windows GUI, everything works fine. The component packages I'm attempting to install are:
cp012724 (MPIO DSM) and cp011316 (SES).
The pre-requisite Windows kb932755 has already been installed. Has anyone come across this issue or have any ideas?

thanks