Here is what I have worked out, including the royal house the rules them. Anything I still haven't full decided on is in parenthesis
Kingdom of Great Britain (with a Kingdom of Ireland in union)
-House of Albany (American Royal family descending from Prince Fredrick Hanover, who changed his name, note: POD is NOT peaceful invitation)
Empire of France
-House of Bonaparte
Kingdom of Spain
-House of Bourbon
Kingdom of Portugal
-House of Braganza
Kingdom of Holland
-House of Bonaparte
Kingdom of the Rhine
-House of Wittelsbach
Kingdom of Prussia
-House of Hohenzollern
Kingdom of Denmark
-House of Hohenzollern
Kingdom of Sweden
-House of Bernadotte
Kingdom of Poland
-House of Wettin
Hapsburg state (either the Hapsburg Federation of the Austro-Hungarian-Czech Empire, any ideas?)
-House of Hapsburg
Empire of Russia
-House of Romanov
Principality of Romania
-House of Romanov
Principality of Macedonia
-House of Hapsburg
Kingdom of Greece
-House of Bonaparte
Kingdom of Tuscany
-House of Hapsburg-Lorraine
Kingdom of the Two Sicilies
-House of Bourbon
Duchy of Albania
-House of Bourbon
Kingdom of Sardinia
-House of Savoy
Papal States
Basically, in Europe, Napoleon hangs on to power after a different set of wars (including no Spanish campaign/double cross and alot more action in the Balkans). The negotiated peace, The Treaty of Naples, results in the loss of alot of Napoleon's gains being erased in exchange for a lasting peace, the exceptions of course are the Kingdom of Greece and the Kingdom of Holland. The Kingdom of Poland and the Kingdom of the Rhine are in the satellite of Paris, but considered acceptably independent. Below is a map of 2008.