so i am doing the tug tutorial and im at the point where i need to export the unfinished vehicle in to jbeam. apparently there is a script for it and i downloaded some thing but dont know where to put it. i have two files now there but the site doesnt allow me to put the third one bu its the BlenderBeamNGEport
Just try to google 'install Blender plugin' , browse results and follow instructions. Use the BlenderBeamNGexporter plugin. There's two real great sites concerning Blender : blenderartists.org and blenderstackexchange (these are approximations of the adresses but you will surely spot them in the google results).