Put the ship(s) in seazone next to the province (example: the Sund if you wish to embark from Skåne). Click the army in Skåne then right-click the ship. when troops are embarked, you can click the sjip and sail to whatever destination. to disembark, click the ship, at the bottom you see a new box 'urlasta' in the swedish version. Click it and then the province you want to invad...liberate!
Hope you are happy and smiling now
