To spawn the leaders first open the HXD editor and open your ide (save backup in case you mess up
). Search the name of the character you want to spawn (Ctrl+F). Then you will notice something like ...ÿÿÿÿ/Global/... (FF FF FF FF).
Change all the FF FF FF FF to 01 00 00 00 and then save.
It would look like this after you edited it: ......./Global/...
If this didn't help very much I will make a video tutorial