How do I change the checkbox BOOL field from 'TRUE/FALSE' to display 'YES/NO'?

How do I change the checkbox BOOL field from 'TRUE/FALSE' to display 'YES/NO'?

KNIG02 - Jacqueline - Knight - 1 - 0  02-02-10
		0		false	Toothpaste
KNIG02 - Jacqueline - Knight - 1 - 0  02-09-10
		0	1	false