A mobile media projector system is provided with a chassis, configured for attachment to a mobile platform, having a screen deployment mechanism. A viewing screen is selectively deployable when the mobile platform is parked in a stationary geographic location. An imaging projector subsystem projects an image onto the deployed viewing screen. Typically, the chassis is configured for attachment to an automotive vehicle with a roof, and the viewing screen is deployed over an exterior surface of the automotive vehicle. The system may include a WLAN and/or WPAN access point. A targeting application may select the geographic location from a group of stationary geographic locations, each having a weighted value. A second mobile media projector system includes a chassis configured for attachment to a roof of an automobile having a side mirror. An image projected onto the side mirror is reflected onto a surface such as the automobile door.