[U-snafu]

If I remember correctly---You have to get the map cordinates from the mission editor for where you want them and then actually place them using the the locations file in the terrain folder.

general example: 1. open the Lnd layer in mission editor--place the pointer of
your mouse on a spot where you want to place the lighthouse and
write down the long and lat numbers (last two set of numbers
showing on lower left of editor map screen). then close out.

2. open the "locations file" with notepad in the sh3/dat/terrain folder.
3. find a location # listing with a _lighthouse file in it within the location
listing.
4. copy and paste that listing at the end of your location file.
5. renumber the listing so it is the last location # in the location file.
6. change the long and lat #'s to what you wrote down from the editor.-
-you might also have to change the "on land" line to "=true/ or =false"
depending on how close your cordinate points are to the water edge.
7. close out location file and click yes to "save new changes"

This same method can be used to add ports, cities, and town files to your install--you just have to play with it to find what file is what.

BBW wrote a great tutorial on it a while back--I'll try to find the thread for you or you can check his filefront page--he might still have it for download.