Group 1: Maintain same retroviral therapy unless: there is a CD4 count decrease of 25-49% within 24 weeks of the count falling in the range of 300-499 in which case both retroviral therapies are changed, there is a CD4 count decrease of >= 50% within the 48 weeks of therapy from the time the CD4 count fell within the range of 300-499 in which case triple therapy is initiated, or there is an AIDS-defining illness in which case triple therapy is initiated.