Good 911reg, I already managed to solve it but it was not with l2edit, with rumtime I managed to do it, you have to import the sounds into rumtime and import the model to be able to save it as .ukx. and you can open that .ukx with unreal patched and you can create the npc no problem, and if you can reopen and edit everything except the sounds, if you touch the sounds the file gets damaged. Now I can create a .ukx with sounds, animations, models, textures, effects. all in one file. Greetings and thanks for the guidance.