4. For the Nelfinavir phase of the trial only: Patients who are taking Antiarrhythmics (amiodarone, quinidine), Antimycobacterial (rifampin), Ergot Derivatives (dihydroergotamine, ergonovine, ergotamine, ethylergonovine), Herbal Products (St. John's wort/ hypericum perforatum), HMG-CoA Reductase Inhibitors (lovastatin, simvastatin), Neuroleptic (pimozide), Proton Pump Inhibitors, or Sedative/ Hypnotics (midazolam, triazolam). Note: Patients with the following conditions are deemed unsuitable for cisplatin-based chemotherapy (and will be treated with carboplatin): (a) Hearing impairment/ peripheral neuropathy Grade 1 or less at baseline (b) Symptomatic/uncontrolled congestive heart failure (unable to tolerate volume load with pre- and post-cisplatin hydration)