You ask about psychological "stages" in HIV/AIDS. The only stage model I have found helpful is the classical stages of grief. I would re-phrase them as denial (sometimes with breakthrough fear), anger, bargaining, sadness, and integration or acceptance. These stages (actually processes) are probably found in adjustment to any serious illness. The psychology of HIV/AIDS is complicated by a number of other factors. Depression is the most common psychological syndrome encountered. Social support is extremely helpful. There is some good professional information available at www.thebody.com.