I have made a decision to free up the modding of data for Estab. We will rely on the restrictions built in for Scenario files to protect our stock data. To this end I have just finished implementing a new feature into the release version of the ScenMaker which Miquel had worked on for the debug version. There is now a new Estab Migration menu item under the Tools menu. This will ask you to select a new Estab file and then ask you to save your current scenario under a new name and then it will migrate the estabs across to work with the forces in the scenario file. If there is an exact match then all well and good. The new scenario will be right to go. If it encounters a problem -eg a force with no comparable estab - it will throw an exception and say "This scenario cannot be played for the following reasons:" You will need to chase these down and assign valid estabs to each of the units identified. Note that if you are migrating estab files to a stock scenario it will automatically change the new created scenario's file type to "derived".