I did this gallery the same way as the ledge shelf and living room gallery wall. This wall was hard because it was HUGE so we tried arranging it all on the kitchen table first. That worked great until the kids wanted to eat then it was really inconvenient. Most of the frames are old ones. I did get a few new ones from Ikea. The rest I just spray painted white or black to match. Spray paint I love you.
Love how it turned out!