Added 16 minutes later
No, something didn't work. I created a folder called black_knight, copied the above-mentioned data into it, and replaced the shared path with necropolis/Shadow_Dragon, but it didn't appear. Maybe the path is specified incorrectly. Since there is no shared folder in the black knight itself, I have long specified the path to the dragon there, and here too - but it didn't work...
Added 3 minutes later
Ah, damn it, I should have pointed it to Undead, not the dragon. Knights are used instead. What a fool I am, I'll try to fix it now...
Added 11 minutes later
Nope, something still isn't working. Moreover, if you click on the created black_knight folder in adv_object, its model will appear, which means I specified the shared path correctly. But in the editor, the darn thing still doesn't appear. I even put a 128x128 icon there, but there's still no reaction... Maybe it needs more than just one shared file to appear in the editor?