My new map-based landmark editor is now fully functional and available. Version 0.2.0 can be downloaded at http://pairadice.xnbc.org
It's really simple:
1. Point the program to any of your server directories
2. Select the map(s) that you want to edit
3. Click the check boxes for the targets that you want keep
4. Click the "Make Landmark File" button
Have a nice day!
(Your comments and suggestions for changes/fixes are greatly appreciated.)