1. I know these from a book I read, but I think you can be creative with the verses: “May I be happy”, “May I be healthy”, “May I be free from danger.”, “May I take care of myself happily.”
Just try to find some verses that generate some feelings of metta in you.
2. Maybe he does five minutes of metta before his breath meditation. He could also be watching the breath with metta. You can have metta towards anything in your experience, not just people.