To evaluate the safety and tolerance of topical cidofovir (HPMPC) therapy for refractory mucocutaneous herpes simplex virus disease in AIDS patients. To determine whether topical HPMPC therapy can induce re-epithelialization and healing of refractory mucocutaneous herpes simplex virus disease in AIDS patients. To evaluate the virologic effects of topical HPMPC therapy on herpes simplex virus shedding from refractory lesions.