Hanging Picture Frames of Various Heights on the Wall

I'm in the process of improving our house and I'm seriously thinking of making our drab wall to a fab one. One of the things I thought about is putting picture frames of various sizes with our faces on it. Initially, all I wanted is to hang just 2 big blow up photos of me but I thought that the space will be wasted if I will only put two photos of my own picture.

Thinking it would be nice to make a collage or sort, I found this nice picture frame set up. Now, I am thinking of having some of our photos printed and buy some frames at the bookstore.

I know this will be a challenge for me but I will do my best not to make the wall messy.

Source: smileandwave.typepad.com