Yes you can you need only to cange the fuse , see this site for the default arduino fuse http://www.codingwithcody.com/2011/04/arduino-default-fuse-settings/
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16