How can I display a BOOL checkbox field as 'YES/NO' rather than 'TRUE/FALSE'?

How can I display a BOOL checkbox field as 'YES/NO' rather than 'TRUE/FALSE'?

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