I was faced with mounting doors to quite a few single-door cabinets, and came up with a technique that worked very well for mounting the clips for conceiled hinge in the cabinets. I made up a “door stile” from Melamine with the same height and edge treatment as the doors to be used, bored the cups and press-in plug holes at the same spacing as used on the doors themselves. Then mounted hinges into the Melamine stile, attached clips to the hinges, placed the Melamine stile in the door opening with a 1/8″ shim under the lower edge, and screwed the clips to the side of the cabinet. Uncliped the hinges from the clips and repeated the process with the rest of the doors. I found that I could then mount the doors to the installed clips with very little adjustment required. I did make sure that the adjustments on the temporary hinges were set to mid point (they always seem to come with the adjustments set to the far edge of the adjustment range). I used Melamine (or particle board) for the temporary stile to make removal of the hinges easier when the job was completed, as the press-in plugs are nearly impossible to remove after they’re installed. With particle board a couple of score marks with a chisle and a strike from a hammer to the fiber board will make it fall apart.