You can use my tool that looks more easier:
1. How to open a raw file (the file extracted with NosSuite): IMG -> Open -> Choose the raw file
2. How to replace an image: T -> Replace -> Choose a your image
3. How to insert an image: T -> Include -> IMG -> Choose your logo or a your image to insert
-- How to apply an included image: T -> Include -> Render
-- How to remove the included Image: T -> Include -> Remove
4. How to save the edited file: T -> Encode