I've been writing a bit about mission scripting on the EE site:
I hope this will help people in building their own missions/scenarios. Right now it's a 4 part series, which starts out with which tools you need, and ends with a mission, where you need to recover an escape pod from a destroyed transport.
It currently covers the following topics:
* Setting up the proper tools
* Setting up a world with stations, nebulae and other stuff
* Creating other ships, and giving them orders
* Setting up a basic mission sequence
Let me know what you think.