I'm sorry for your loss. The answer to your question depends on your current experience with After Effects and the time you want to devote to the project. I moved your posting from the "Create your first After Effects project" forum to this general-purpose forum in the hopes that a larger After Effects audience might be able to help you out.
I'll give a very brief overview but, presuming that you are new to After Effects, understanding and executing on this overview will require learning the basics of After Effects.
You'll be creating a 3D scene based on a few 3D layers: one each for the floor and each wall. Each of those 3D layers will be a precomposition layer; the wall layer with the pictures will be based on a precomposition in which you have placed your pictures as individual layers. You will create some 3D lights shining down from above. You'll create a 3D camera that you will then animate to move down the hallway.
As I said, that is a very brief overview. Understanding each of those pieces will require some learning. After Effects is not a simple application, so you do need to be prepared to put in some learning time if you are going to do this yourself. Here is the place to start: http://adobe.ly/AE_basics
All that said, I would recommend that you hire someone to do this for you. Learning a new and complex creative application under the time pressure (and other pressure) that you are under may be too much to ask.
THANK YOU SIR!!!!!!!!!!!!!!!! you have no idea how thankful iam that someone finally explained that to me. Im very naive and would like to learn and I thank you for shedding light in this.