Can only speak for the lower deflectors & highway bars (Triumph brand). The lower deflectors are pretty simple. You may have to alter the angle to get the best "air flow" results for your riding posture. The highway bars require "some" mechanical aptitude because (on the Triumph version mind you) you will need to remove one of the main engine/frame attachment bolts (about 12 to 14 inches long) to install the bars. You need to put a tappered bar into the hole that the bolt extracts out of first (on one side of the engine) to assure that the "reinsertion" process can be accomplished. I cannot speak for the Rivco set, although they appear to be stouter for the highway pegs (the Triumph bars flex under mild load but still do the job).
The instructions of the highway bars were pretty good if I recall.
Good luck donaldinnewark!
See ya.