Just copy the entire DR_Engine_Sounds folder over - and then, copy the aircraft/shared, aircraft/Shared hires Lores cockpit textures, root/pylons, weapons, guns, and effects folders and effects.xml. You should then be able to swop MAW aircraft in and out of your basic European install without any trouble. You might be missing a cockpit or gunsight texture here or there - you'd have to search for them - but everything should work fine. Don't forget to run the bdp zapper before firing it up again, though!