The project manual was a product of the 3-year project, "Functional Mainstreaming for Success," (FMS) designed to develop a model for instructional mainstreaming of 162 handicapped children (3-6 years old) in community settings. The major feature of the project was development of a full reverse mainstreamed preschool program, which included children with and without handicaps in the same class in a 50:50 ratio. The manual's introduction examines the project background, explains its service delivery philosophy, provides a detailed definition of mainstreaming, offers an overview of the FMS project, and describes the project's use of total and partial reverse mainstreaming. The remainder of the document details activities and materials involved in the completion of the ten project planning tasks. These tasks concerned: (1) administrative commitment and decision making, (2) staff preparation and awareness activities, (3) modification of service delivery systems, (4) parent preparation, (5) peer preparation, (6) child identification and recruitment, (7) Individualized Education Program decision making process, (8) implementation, (9) evaluation and transition, and (10) consumer satisfaction. An appendix provides a listing of project products or literature reviews. (DB)