I want to add a few comments to LaRue’s recommendations. The first steps towards the program design are always the same in that you get clearance to exercise, perform an assessment and otherwise gather as much information as you possible can about the client’s health status and goals.
The program itself will depend also on other criteria: overweight clients often have limitations that make certain exercises almost impossible to do. Many overweight clients cannot get off the floor or could not safely get off a flat bench, for example. That eliminates a fair number of exercises. Knees and the power back are often painful. It is here where the creativity of a trainer comes in. If an overweight client has seen a physical therapist, those exercises can be a good starting point.
There is no one set of recommendations because every client present himself with unique challenges.
I wish you good luck.