I just got SLauncher, and am sorta confused as to what it is used for. I like the 'memory manager' screen, but other than that it just seems like a different layout for my menus.

Is that all this program is used for?

Yes Slauncher is only a substitute for standart menus interface.

sLaucher substitutes the standard menu and Task Manager.Here you can find a more detailed explanation: http://symbianware.com/product.php?id=slauncher60&pl=n3650