I own Hollywood but not Hollywood Designer. Hollywood by itself is a Basic-like programming language for multimedia.
With the Malibu plug-in it will import Scala presentations for use on 24-bit capable graphics cards.
With the Hollywood Designer package, it has a graphical environment somewhat like PowerPoint except that you can still edit the Hollywood scripts for greater control with Hollywood Designer's syntax-highlighting editor.
There is a PowerPoint importer plug-in coming out for it also.