[Request] Can someone please help me out for my Grandad's funeral?

My Grandad passed away recently and we have a great photo of him we want to use at the funeral, but my brother and I are also in it. If possible, we want to remove the two of us and just leave my Grandad in the middle.

http://i.imgur.com/fep01.jpg

Sorry the photo is so small and low quality. The original was taken about 15 years ago and this is a scan of it.

If anyone could help I would be really grateful!