The usual way of creating a flyover presentation in rendering software such as 3D Studio Max is to create a travel path. The camera is then attached to this path and told how fast to travel along it, where to point, and when. This is exactly what you can do in SketchUp too. This method is usually preferable over the walkthrough you've already looked at because:
To prepare for the next step, you need to download and install the following plugins:
Flightpath.rbplugin by Rick Wilson from http://www.smustard.com/script/flightpath
BezierSplineplugin by Fredo6 from ...