[valo2000]

i have done this many time in a save game if i wanted to make for example an international core force.

You start the long campaign buy your units and deploy them. the you save the game.

then change it from spsv001 to spscn501(there are always 2 types of files) for exapmple then you copy it into the scenario folder.

using the editor you can now change your core forces the map the enemy units whatever.

then you save the scenario in the editor.

then you copy the scenario file back to the save game folder aNd change the name back to spsv001 or whatever.

now you load the game and play the scenario after ending it anything should continue as always.