I have a 5-foot wide closet (door opening) in the front hall that has really cheap hollow bi-fold doors that drive us crazy. I'd really like to replace those with french-style (open from the center) solid doors. What hardware and planning will I need to do? There is enough room to swing the doors open, so that's not a concern. How about the latching mechanism? Is that built into the header or at the floor, or both? Thanks!