How do i save new UV Map and textures? I am importing a 3ds model with many textures applied on it to blender to bake the textures into a single .png file. I know the workflow for that, I create a new UV map, Unwrap the model and bake the texture. I get the results I want on the baked texture so I then save the Image of the new texture. 
Everthing works perfect but now is where my problem starts:
When i export the model back to 3ds I will still need the original texture files instead of the single one I just baked. 
Same when I just save the .blend file. Next time i open the file it is using all the original textures files instead of the baked single one.
Can anyone help me please? thanks in advance!
After you baked your multiple textures into one texture, you need to tell the material of your object to actualy use this new Texture. Eyther create a new material or alter the old Material to use this new Texture.