I tried to make an example on this, but then all props and stuff started falling through the displacements in my map so I got pissed and deleted the whole project.
It was gonna include APC movment and missile, Strider movment and flying things.
The stupid thing is, I've totally forgot how to make a strider move but I think you set the thing up correctly.
Info_node_air and path_corner's.
A thing which works when APCs won't move is to add hints, so try to add some hints next to the path corners.