Hello Matthew,
I like to drill two new holes lower down on the snap frame, screw on eyelets that take a nut and washer, and then use framing wire between the eyelets. Then, I put two 50lb frame hangers into the wall. I put the poster in the frame before hanging it. Finally, I hang the frame onto the two frame hangers on the wall, and center the frame. This has always worked for me. I like the Cinema Wide snap frame from Spotlight Displays. Okie