Nagios Emails

Does anybody know how to modify Nagios e-mail notifications? I am not looking for how to modify the reporting statistics but rather the subject line format of the e-mails that are sent. For example; I would like to change ** PROBLEM Service Alert: Server Name - Prod File & Print Server/D: Drive Space is WARNING ** email subject line to ** Service Alert: Server Name - Prod File & Print Server/D: Drive Space is WARNING **

Any advice is appreciated.

Regards,

it’s defined in commands.cfg