Two investigators joined forces to test an intervention to improve services for patients with co-occurring mental disorders. The researchers¿ applied theoretical understanding & the counselors¿ intimacy with patient responses combined to strengthen the intervention. However, counselors¿ discomfort with some protocols & changes reflecting the dynamic nature of the community-based research setting complicated the study execution & interpretation. The intervention improved the counselors¿ ability to identify & respond appropriately to patients¿ co-occurring disorders. The experience also demonstrated the advisability of consulting collaboratively with clinic staff during the planning of studies & the pre-testing of study protocols. Chart.