If you are eligible for this treatment, you will be assigned to one of the two groups that either receive one vaccine or two different vaccines, depending on your tissue type (either gp100 vaccine alone or gp100 and MAGE-3 vaccines). A small amount of the vaccine(s) will be injected under your skin to test your body's immune response to the vaccines. The size of the skin reaction will be measured at 48-72 hours. This skin test will be done before you receive any vaccine, at 6 months, and at 12 months, if possible.The participant and/or participant's family will be given detailed verbal and written instructions on how to measure any reaction to the skin tests. A data sheet and ruler (cm/mm) will be given to the participant.