Bone Marrow Transplant in Treating Patients With Hematologic Cancers

DISEASE CHARACTERISTICS: * Histologically confirmed diagnosis of: * Acute myelogenous leukemia * Complete remission (CR) 1 - ALL except good cytogenetics defined as \[(inv16, t(8,21), t(15,17)\] * CR2 * Induction failures * Relapsed OR * Acute lymphocytic leukemia (ALL) * CR1 - high risk defined as overt CNS involvement, 1 or more risk factors (age 30 and over, WBC at least 20,000/mm\^3, at least 4 weeks to CR1, myeloid phenotype) * CR2 * Induction failures * Relapsed OR * Chronic myelogenous leukemia * Chronic phase (CP) 1 * Accelerated phase (AP)/CP2 OR * Chronic lymphocytic leukemia * At diagnosis - RAI stage III/IV or Binet C * Must undergo 1 induction regimen * Relapsed - any stage * Must have received no more than 3 regimens for diagnosis OR * Multiple myeloma * At diagnosis - stage II/III (primary refractory or sensitive) * Relapsed no more than 2 times - sensitive disease * Plasma cell leukemia OR * Myelodysplasia * All subtypes eligible OR * Myeloproliferative disorders * Poor response to medical therapy OR * Cytogenetic abnormalities * Must have a related donor who is genotypic 6 out of 6 HLA A, B, and DR match * Molecular DR matching required PATIENT CHARACTERISTICS: Age: * 15 to 55 Performance status: * Karnofsky 80-100% Life expectancy: * Not specified Hematopoietic: * See Disease Characteristics Hepatic: * Bilirubin no greater than 2.0 mg/dL…