I have not actually completed this yet. I have the projector and I use Vixen 2.1 I, too, was going to use it for projecting the Grinch...
Note that I have an old, high-end Mitsubishi ColorView SL4SU projector. It supports serial (USB) control. Things like, turn on, blank display, show display, etc., plus a lot of configuration that I wouldn't need.
What I have done so far:
1. Installed a better graphics card that can drive two displays in the show computer.
2. In Windows, set my system up to use both displays with the project display as the 'second' display (ie. not primary).
3. I have created some PowerPoint slides of the Grinch to be projected.
4. PowerPoint opens in the second display, maximized in Presentation Mode. Note that PowerPoint supports limited external control.
What I need to do still:
1. Create external applications/scripts to send desired serial commands to the projector.
2. Create external applications/scripts to control PowerPoint slide changing, reset, etc.
3. Plumb both into Vixen using, most likely, Launcher.
As I said, this is not yet completed. I stopped working on it in the summer when my wife said that she would rather use a Grinch inflatable than the projector. It is still on my list if things to do, but I won't work on it right now since it requires access to the show computer and I don't want to do anything to derail my show which has been running since Thanksgiving now.
Jimboha