Intro: Pixar Decals
Step 1: Using Inkscape to Create a Decal
Step 2: Tracing an Image in Inventor
A more manual way to achieve spiff profiles is to start a sketch in your favorite 3D CAD, Inventor, and import the image to trace over.
Once completed, right click the sketch in the model tree and select Export Sketch as DXF
Step 3: DWGs
If you'd like to use the DWGs for your own awesome decaling projects just remember to post pics.
I've also included a third decal that didn't make it to reality because its respective Ember was reallocated. I'm sure I'll bring it to reality someday soon though.