Hi i want to use in lfs editor both obj files once, can you please tell me how to do it?

I think you'll have better luck asking these questions in the 'vehicle mods forum'
Best of luck

You need to create a new subobject and import the OBJ file into it.

1. Enter the Modeller (press E)
2. Make sure you are in "subob" mode in the top bar
3. Click "new subobject" green button
4. Click "OBJ" next to the load/save buttons at the bottom left

Quote from Flame CZE :

You need to create a new subobject and import the OBJ file into it...

Thank you!

Actually I wrote it wrong, it's not possible to directly import an OBJ file into a subobject.

- Enter the Modeller right from the main menu of the LFS Editor
- Click the OBJ button and load the 3D object
- Click SAVE to save it into 3dob folder
- Close the Modeller and load your mod in Vehicle Editor
- Go to Modeller, select your subobject and click "load" to load a new subobject