Here I explained how the folder structure for an addon should work:
Well in your
/base/map/ folder is a
/europe/ folder which has the sectors in, if you have the sector overlay by pressing A a few times (you may have to zoom out) you should be able to see what sector you are working in. In the
/europe/ there are the sector files, all you need to do is find your sector (or sectors.) So lets say your sectors are +0015 -0003 you search for them and there should be 4 files: .desc, .data, .aux, .base. So with our sector it would be +0015 -0003.desc, +0015 -0003.data, +0015 -0003.aux and +0015 -0003.base. Now that you have your sectors, you need to overwrite the defualt promods sectors sectors to do this you need to make in your
/mod/ folder a
and copy your sectors into there. (The z in front of mod_yourname is there to show the game it has to load first) Now when you enter the game again the sectors will be overwritten with your name. Now next time you save after you worked and closed the game you need to get your 4 sector files and just replace the exsisting ones in
/mod/z_mod_yourname/map/europe/.
Hope this helps