I have made a 'lift tower' (in Tests.ocf/Experimental.ocd/LiftTower.ocd). The model I took from the forum somewhere. By interacting (careful you can grab it as well) you get a rope with a hook on the end. This hook  can be hooked on to every C4D_Vehicle. If you then grab the tower and press up you pull in the rope. I thought this to be a nice way of transportation. Maybe connecting lift towers will be possible.

It is in experimental because I failed to make good use of the rope. The applied force is incapable of proper pulling. Nonetheless I wanted to have some feedback on this. If no one likes the idead, it won't invest more time on it.

Regarding the rope, I have a question more or less directed at Randrian. Are you willing to polish the rope so it fits the task?
I will have a look at the code but understanding it will certainly take long. At least this week and next weekend I will be busy. So far, the applied force is unsufficient of pulling something in most of the times. And reconnecting the rope to another object wasn't possible. I had to create a new one every time. This horribly fails when there is material inbetween the objects.