Hi all! Before I post my question, I just wanted to say that I have received great advice through this blog, and thank everyone who has responded!
A friend recently purchased a beautiful fiberglass entry door with leaded sidelights, but discovered that he could not fit the entire unit into the rough opening on his home. He did, however, use the door itself, and offered the frame w/sidelights to me. My current entry door, a solid 1 3/4" thick old-growth pine, is exactly the same size as the fiberglass door removed from the frame; except for the fact that it is about 1/4" thicker. Assuming I can fit the entire unit into my rough opening (and initial measurements indicate I can), what is the best way to accomplish this retrofit? My thinking is to begin by filling the existing hinge mortises and lock locations in the frame with wood inserts and start hanging the door anew. Any suggestions would be appreciated!!