To keep a model stationary from, say, 1:00 to 2:00 you need to key frame it in the same spot at both 1:00 and 2:00, and the keys need to be "zero-sloped" so that no spline interpolation is happening between them.
Take a look at my "Keyframing Basics" video, found in tutorials link i my signature, for more about keyframing.