Hello RAMWolff, Just check that your " paint version" as its UV correctly set like the original. Then, when importing your map by drag and drop, a popup appears. When BS3D ask to apply to the whole torso material, check "yes". IF UV are still there, material name unchanged, your map should apply correctly.

There are all the video tutorial concerning BS3D on youtube.

Sorry if i bored you with my tutorial.....

Best regards,