Download and install FLMM first. Next, download and install the SDK File, which is a complete data file that is decoded. The click on the downloaded mod file, it should install in FLMM now. If Flmm has not opened, it should on its own after install mod, click on the mod to activate it, and then start a new game. If you have not done so, open the My documents/my games/ freelancer/accts/singleplayer and delete any saves you have, including Auto saves. They can cause problems if you dont. Then just start a new game and enjoy.