I spent part of the weekend replacing the doors in our basement. They were the typical flat-slab 1970's doors. These six-panel doors are nothing special, but they were very cheap, and at least look more up-to-date. I did the work on the back porch, giving me a nice view.
These doors needed to be cut to size, drilled for the knobs and routed for the hinges. I basically took each old door and used it as a pattern for the new one. The picture shows the stop-blocks clamped in place for routing the hinge pockets.