How do I force SilkTest to record mouse movements?
While you are recording actions, hold down the Shift key. This will essentially tell the SilkTest Recorder to record each mouse movement that you make. This allows you to start and stop recording mouse movements by simply holding down the shift key and letting it go as and when you need.
The other option would be to uncheck the "Ignore mouse move events" setting in the Options/Recorder.