From here you can load \Packt3dsMax\Chapter 10\Creature_SkinStart.max, which includes a ready CAT rig and the low- and mid-resolution meshes. Note that before you start, it is worthwhile to check for and delete empty objects in the scene or stray vertices floating in the model (tiny polygons that aren't attached to anything or other weird geometry glitches). This should be done before skinning or it can lead to corruptions of the vertex weights.
Select the
BullCAT Parent, and in the modify panel note the CATUnits Ratio value is 1.0. This is important because if the mesh was scaled very small and the CATUnits Ratio value was 0.1, for instance, you might get problems if you were to load save motions onto the rig (which we'll be doing later). It is better to size up the mesh than size it down. Remember to apply Reset Xform on the mesh if it does need scaling. You can do this quickly from the menu bar by clicking on Edit | Transform Toolbox, and then selecting the R button...