Good point ChaosLord, In order to get your Scala presentations to work on a graphics card equipped system, you'll need to either A) shut down your graphics card (by disabling the CyberGraphX patch in s:startup-sequence along with any CGX display modes in the monitors folder) and use AGA, or B) buy Hollywood and the Malibu importer for Scala presentations and use that instead.
For option A you'll need a 15 KHz monitor (horizontal sync) or TV to hook up to the AGA outputs of your machine.
For option B you'll need a fair amount of money to upgrade to Hollywood 4.5 + Malibu. You'll have the advantage of being able to compile your presentations as stand-alone executables for any 24-bit capable Amiga-like system or Windows or Mac if you choose this option. Links:
Hollywood,
Malibu, and
order form with bundling options listed at the bottom.