the simple way is to contact some one here that you can pay to do it for you like Kidtech
http://www.plasmaspider.com/viewtopic.p ... ad#p146669
there are others too. If you want to learn to do it yourself you need a drawing program that has trace functions, Inkscape, Corel, and AI.
There are many youtube videos on how to use these programs to do tracing.
For something like your truck pick a place to take a picture of it with one color background and with the sun high in the sky so no shadows on the truck.
Look for the identifying lines or objects in the image to trace, to much detail or closed objects cause problems. Watch for drop outs or things that are to small of to close together. Use the ones you have seen here for examples many are fantastic.