BackUp Program

I wonder if it exist some program that does:

- I copy my iPhoto to my hard drive thats connected to my Airport extreme, automatically when I change something within iPhoto so I dont have to copy my 10GB iPhoto every time

- The same program copies that version to my MacBook with just the updates so it keeps it updated

and same thing if I copy iPhoto from my MacBook, then my iMac updates to that version

Anyone if such program exist?

or a good backup program that you can say "BackUp this file for me" instead of Time Machine that you have to mark all the files that you dont want to be Backed Up

thanks in advance =)