i think this will work
- load the scenario
- go the editor(cheat mode)
- save the map(from the "save map" button
)
- exit the editor and the scenario
- go to new game
- launch the editor
- load the map(now you should have a clean state with no extra slic or whatever)
- put your settings for the starting places, etc
- save as scenario(my guess it that if you save it under the alexander scenario pack you will also have the same units, etc)
- you should be done
btw, moving to ct2-creation