Help with Instances

Hi,
I am a newbie here and purchased a website template that has nothing but instances in the template itself and I can not understand how to manipulate them because if I manipulate one of them then the site goes all wacky on me and I am so frustrated with the way it is and would appreciate any and all help I could get with it.

I can send the source file if someone is interested in looking at it.

But the website is http://www.stephengibsonphotography.com

Any help would be greatly appreciated.

Thanks,

Steve