Topic: help needed with blender and leocad

im trying to put a drive trail on a lego falcon i rendered in blender but dont know where to begin, can anyone recomend a tutorial or anything?

also does anyone know how to make custom colours in leocad?
and does anyone have a leocad stormtrooper helmet file?

peace

http://www.youtube.com/watch?v=RUuwy0GBWK8