Control Checkbox

Hi everyone
When i'm designing a form i've choose a control box,
checkbox.
First question : when i print that email i got with that
checkbox checked, it appears the value -1. If i don't
check that checkbox it appears the value 0 after i've
printed. How can i change it to yes and no?
Second question : can i change the way data are printed on
my printer? I mean, all fields are printed alfabeticaly.
Can change that order?
Tks in advance
Pedro