Attached Link: http://www.jwhitham.plus.com/VuePython.html

Now added a new(ish) script. See the bottom of the page at above link.

Similar to the last, but uses terrain height + instance offset, rather than 'leader' z position to set instance positions.

Not so easy to explain, here's a link to a demonstration avi (DivX 5.1):

Demo video