if you're wanting a new western Europe, please be paitent! FRPigion is working on a modern version; look in the Missions/Campaigns Forum for his thread
http://combatace.com/topic/83063-europe-total-war-1979/
Leeuwarden is definately on the WW2 Euro (sometimes called "EAW Euro") and my "Norway" map, but again these are very specific for WW2.
How familiar are you with the folder structure of SF2? Do you remember that new add-on stuff goes in the
C:\Users\- your name -\Saved Games\ThirdWire\** name of game **
folder instead of the
C:\Program Files (x86)\ThirdWire
To be honest, between SF1 and SF2, the folder structures ARE basicly the same, but just in different locations.
You need more help, just ask