<qa>  What is the goal of this study?The goal of this clinical research study is to find out the highest safe dose of DOTAP:Chol-fus1 that can be given to participants in the treatment of non-small cell lung cancer NSCLC or small cell lung cancer SCLC. This study is an attempt to transfer a gene fus1 into cancer cells, using the drug DOTAP:Cholesterol-fus1. Researchers will also study the side effects of this experimental gene transfer at different doses, and will conduct tests to see if there are any effects on tumor size at different doses. Experimental transfer of the fus1 gene into humans has never been tried before. 