Many thanks for your reply. As I mentioned, I had great difficulty getting nl2000 installed. I could not get away from the set-up program. In desperation I reinstalled FS2000, installed both nl2000 and the update and copied it into the folder I use for add-on scenery, putting in the flatten lines as...

I have installed nl2000 in FS2002 (with some difficulty) and have found that aircraft altimeters show the aircraft to be some 1200ft below sea level when on the ground all over the world. Is it the way I have installed it or is this a known or not known problem?