Now it is easier to install System Center products using Unified Installer.
The Unified Installer let’s you choose which System Center components you want to install and the destination for each component. Take note that the Unified Installer will not allow more than one System Center component installation per computer (or VM), but it makes the installation of the System Center components much easier.
http://blogs.technet.com/b/uspartner_ts2team/archive/2012/01/31/system-center-2012-unified-installer.aspx
Ali
