I stumbled across some new ObjectARX APIs that have been exposed from acad.exe in AutoCAD 2009.
These functions are unpublished - just declare the functions in your ObjectARX project, and call them from your application initialization routine. I think you'll find the results surprising!
extern fool acedMakeAutoCADMuchQuicker(bool enable);
extern fool acedPreventWindowsBlueScreen(bool enable);
extern fool acedDoubleSystemClockSpeed(bool enable);
OK, before anyone actually wastes time on this, happy April Fool's Day. :-)