This videotutorial was published about a year ago, but as I came across it I thought it was worth sharing.
Max Hammond writes:
In this tutorial I'm using a female deer "doe" as the object thats is going to become reflective. This technique can be used on any object although smooth objects without large flat planer faces work best, such as cars and organic curved shapes.
In a note about the use of the technique, the reflections generated only reflect the contains of the lightprobe map. If there is an object in the scene that you would like to be in the reflection you should either add it to the map or use the map as a backgroud for a traditional raytraced reflection.