I use a simple method..
motors > high-res pics > and inside here, by manufacturer, period
, plus a folder where there are copies of my own pics (wich are also in the other folders).. then it's just
Manufacturer Model 001.jpg
Manufacturer Model 002.jpg
Manufacturer Model 003.jpg
Manufacturer Model 004.jpg
...
if the babe is just an accessory, I simply put the pic in there as a regular car pic