All types of exterior doors have advantages and disadvantages. Depending upon your needs, you should choose a new door with looks, durability, price, and energy efficiency in mind. All door types are available with windows, transoms, and sidelights.
This article outlines the basic steps involved to install a single pre hung exterior door. Installation instructions may vary from one door company to the next, make sure to read and follow the ones for your specific door. Not doing so could void the warranty.
Beginning with the bottom of the hinge side have your assistant tack (leave the head stick out) a finish nail thru the brick mold and into the rough framing. Work your way around the door insuring the margin is correct before driving nails home. Do the bottom hinge side first, top hinge side, top striker side, and finally the bottom striker side. Once this is complete you can release your assistant
Once you are satisfied with the inside margin, contact with weather stripping, and door operation you can install the door permanently.
I prefer to use screws instead of nails whenever possible for obvious reasons.
All fasteners should be driven directly thru the shims to prevent distortion of the side jamb.
Never leave shims between the header and head jamb. If the header sags even a small amount it will interfere with the doors operation.
Step on the door sill as soon as possible after installation to embed it in the caulk.