This is honestly a little rough in that it came straight from engineers and not from our Marketing Services organization. However, we feel your need for it outweighs the need to make it pretty.

This documents a little about how to write scripts, but it does include all the functions and calls that are available in scripting. Feel free to Post questions or comments in the Discussion forum - we may update the document or answer posts directly depending on the nature of the questions or comments.
john p.