This information rich "How To" guide presents ways to help elderly persons with developmental disabilities find and use generic community programs for senior citizens. It discusses successful methodologies, addresses programmatic features, and offers ideas to improve accessibility and resources at the community level. The information is based on experiences of four county-based demonstration projects in New York. Initial sections review project background, explain important concepts (such as developmental disabilities), and identify problems this population has in using local services. The next three sections describe functions of the national and state aging network and of the developmental disabilities system, and how these two systems differ. The following section identifies specific aging program opportunities and how persons with developmental disabilities can participate. A section on how to get started stresses the importance of networking. Remaining sections give guidelines on how to select programs, how to involve participants, how to support integration, and future trends. Nine appendices include a project overview, a listing of district developmental services offices, New York aging and developmental disability networks and local offices for the aging, an annotated bibliography of 20 items, a statement of rights and assumptions, and various memoranda. (DB)