This manual is intended to help professionals and non-professionals develop a peer support system involving older persons in the provision of comprehensive mental health services. The materials focus on: (1) program concept and objectives; (2) links between physical and mental health in the elderly; (3) recruitment and training of peer counselors; (4) health education workshops; (5) support networks; and (5) program evaluation. The first section presents the history, background, and description of the program along with the rationale for its development. The second section provides specific guidelines for developing and adapting the program to fit the special characteristics of each community. A basic premise of this manual is the involvement of older persons in all phases of program development. (Author/JAC)