ABOUT: General Motors (GM) revealed its latest electric concept vehicle, the Opel Flextreme, at the Frankfurt Motor Show in Sept. 2007. Following its unveiling, the automaker has also launched a series of four webisodes that outline the making of the vehicle -- which was initially conceived at the GM Russelsheim Design Center. The shows also highlight GM's E-Flex system and provide information on the design cues that influenced the trademarked FlexDoors, as well as other vehicle features.