This guide was prepared during a 3-day institute to assist those involved in the initiation and continuance of joint in-service training between state Vocational Rehabilitation agencies and Disability Determination Units. The guide is organized around the major considerations in any training program, including: (1) content, which identifies the major areas of concern to which joint vocational rehabilitation-disability determination (VR-DD) training would apply, (2) planning, which identifies who should be trained, who should do the training, and when it should be done, (3) methods, which suggest ways to accomplish training objectives, and (4) evaluation, which gives guidelines for establishing evaluation procedures for joint VR-DD training programs. Several sample training materials are appended. (SB)