So recently I bought a single hung premade window at Lowe's, and it had features that I didn't want so I took it back. I decided to go simple with a barn sash window that tilts open, so I bought a vinyl premade barn sash window at Lowe's. Once I opened it, it wasn't like I expected, and there are no installation instructions in the package or online. I wonder if any of you understand how this window is intended to be installed? Here's the pics. I was hoping that I could frame it in wood, but there are two problems. The sides have built in clips that do not fit 1x lumber, they do not seem to serve a purpose expect to prevent fitting it with 1x lumber. Also, the top and bottom of the window have these structures built into the sides (see picture) that get in the way of fitting lumber across the top. My hope was to frame it in wood, then put hinges on the top so the window could open and be propped up with a stick, or maybe something better. I feel like I'm very much not understanding the product I bought. What would you do with this window? Is it useless to me?