The smart boot manager is a program which runs at boot time, and give you the ability to select which os you want to run. it has a lot of functionality which haven't implemented by other boot managers, like scheduled default, boot from other hard disk than first, good privilege system with encrypted passwords, online configuration, etc.
in this package you can find an installer and a configurator program too. with installer you can easily install the sbm, but the configurator may be complicated, and to end-users i think the online configuration is better. the configurator is good if you want to configure the smart boot manager from scripts.