Bill Wernsing, you will have to remove the
FRONT COVER UNIT
REAR COVER UNIT
BATTERY LID UNIT,
DATE BATTERY HOLDER
SIDE COVER, CF COVER
TOP COVER. Obviously , to many steps that make it tough to post completely on here. I added the service manual to the device page. Page 3-3 and on will show you all you need to know to get the job accomplished. Go to [http://www.ifixit.com/Device/Canon_PowerShot_G3?revisionid=HEAD|this page], scroll down to Repair Documents and click on the blue canon-powershot-g3.pdf link. Hope this helps, good luck.