Hello HarryInk,
Can't get myself into Napoleon's Campaigns. Wish I could but... and I don't know that you can export and import battles, can you?
No, there is no option to do this. The only thing you can do, is to open the saved turn-files with an editor (for example) and to modify the engaged armies. But it's not so easy, 'cause you have to modify all units: casualties, morale and where do they advance or retreat, etc. I wish there would be a savegame editor.
It's a great game and I like the graphics a little bit more than the ACW Game. It would be nice to have a NC2 in the near future with a grand campaign.
I think a good alternative operational game is "Campaigns on the Danube" where you can modify the armies, map, etc. with a hex-editor and you have an export / import battles option.
But you know the best game would be a HistWar-Campaign game...