The Editor for Storm over the Pacific is a powerful tool that will allow to modify existing campaigns and scenarios in the way that player would like to change them.
Take a look at this short video first:
http://www.youtube.com/watch?v=KHsZF4GnRsY
Scenario editor will allow you to modify following parts o the scenarios:
- Terrain type
- Rivers
- Coastal zone
- Hex ownership and control
- Fortifications
- Cities
- Land and Naval units deployment
- Weather
- Fleets and Naval units
- Sea Zones
- Connections between Sea zones
- Countries set up
- Commanders
But what is the most important for many of you who are reading this thread, it is possible to create completely new scenario in the same way as Australia has been made:
http://www.youtube.com/watch?v=lYGtYnLjY9U