Pemetrexed Disodium and Cisplatin in Treating Patients Who Are Undergoing Surgery for Stage I, Stage II, or Stage III Non-Small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy, such as pemetrexed disodium and cisplatin work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving more than one drug (combination chemotherapy) and giving them before and after surgery may kill more tumor cells. PURPOSE: This phase II trial is studying how well giving pemetrexed disodium and cisplatin before and after surgery works in treating patients with stage I, stage II, or stage III non-small cell lung cancer.