I don't actually know much about the Peninsular War, but I guess the map would look a little like this, I'm not sure about what the situation was in northern Spain, but I know southern Spain was primarilly free. Blue is roughly what France has. The "X" is Madrid, it should have very low public order to represent the rebellions there. Maybe I'm too generous here, but France should definately have control of Madrid and have it connected wih the rest of the empire.
The first thing France should do is secure Andalusia (Seville area), as I said, General Castanos would have an army waiting for them. The French should have an army led by DuPont that is moving towards there.
That should be the starting situation. If anyone knows more about the war, please help me.