Spent a few hours today tracing over aerohead's template in OpenOffice Draw...
Here's how I overlayed the template...
Paste the big photo in the master layer and close the master layer.
Resize the grouped template until the template matches up to the top of the roof and the bottom of the tires (maintaining the proper ratio by holding down the shift key while resizing).
Export it as a jpg file.
If you want the OpenOffice Draw file...send me a PM.