I don't have a D60, but I think to do a reset on a D60 you simultaneously press the Magnify button on the back and the button on the top between the shutter and mode dial (both buttons marked with green dots) and hold for more than two seconds. You may want to check the manual to make sure I have this right. That should reset everything in the camera to factory settings.
The switch to actually reset the D60 is located under the rubber cover that protects the USB port. See page 167 of the camera manual.