Personal Photo Integration

I need a photo of a family member added to another picture for a personal use project. I will also need a face from another similar photo imported onto one of the boys since he isn’t smiling in the photo we want to use. Make it looks like the one guy was there with us without it being obvious and change the head on the other person without it making it obvious.

Requirements:
- Import a person's photo into a new background.
- Background should be from an event or special occasion.

Ideal Skills:
- Proficient in photo editing software (e.g., Photoshop).
- Experience with realistic photo manipulation.
- Attention to detail for seamless integration.