How do i download mods i need help cause i want to update swbf1 graphics and collision mesh
Do you mean the mod tools?
they are here
http://www.swbfgamers.com/index.php?action=downloads;sa=view;down=1219
You have a lot of work ahead of you if you want to upgrade the graphics though...
One way to improve graphics even without modding is to enable Anisotropic Filtering x16 if your GPU supports it. Set to override application settings and you will notice a big improvement in graphics quality with minimal FPS drops.
Now for modding u want to start with BFBuilder and other mod tools patches that Buckler has linked to. There are other tools and programs you can use such as MSH viewer to preview changes to textures before munging them in a mod.