go to local INS office, file I-130 and I-485 at the same time.
For parents of U.S. citizen, INS website clear says you can file two thing together, so parents can get EAD, AP before their I-94 expires. please check INS website "How do I? "section and check answer to question" how do I get premanent residence through family-based? "also you can check instructions for I-485 and I-130 on "forms " link at INS website. it has every info your friend needs I think.