RATIONALE: Giving chemotherapy drugs, such as melphalan, before an autologous stem cell transplant helps stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Also, monoclonal antibodies, such as yttrium Y 90 ibritumomab tiuxetan and rituximab, can find cancer cells and carry cancer-killing substances to them without harming normal cells. Chemotherapy and monoclonal antibody therapy also prepares the patient's bone marrow for the stem cell transplant. Giving colony-stimulating factors, such as G-CSF, and vinorelbine helps stem cells move from the bone marrow to the blood so they can be collected and stored. The stem cells are returned to the patient to replace the blood-forming cells that were destroyed by the chemotherapy and monoclonal antibody therapy.