I think this little project took me about 30 minutes.
So, here is a little tutorial:
first, measure your wall (don't know why the color on this photo is so crazy)
next, get some butcher paper or the like larger than your arrangement will be and lay it out on the floor (mine is recycled paper from our plotter at work - it's actually two pieces taped together)
then, lay out your arrangement. move things around until you are happy with the arangement. measure for precision (if you want). then trace around each photo/painting with a pencil
next, flip the paintings over and measure where your nail holes need to be. mark this on the paper.
tape the paper up on the wall. move it around until you are happy with how it looks. in my apartment, I used masking tape with no issues. however, since this paint job is brand new, I bought the blue painters tape
I know this picture is blurry, but you can see the nail hole markings and get the idea that I am making sure the paper is level.
I set my paintings out on the floor in the arrangement one more time before I put any holes in the wall, just to make sure that I was happy with the spacing (more or less)
drive a nail through the paper where you marked that the nails should go. then just pull the paper off the wall, tearing it around the nail -- no need to take the nails out first!
then hang your paintings!
I also used this same method for a grouping of family photos in my office - grandparents wedding photos, my mom and her mom on the far left at about the same age, my grandpa and dad (when daddy was about 6?) and then my favorite photo of my grandpa (he died when I was 10).
and also this small arrangement on the wall by my desk
so, now have fun hanging photos/paintings!!