The one with 2 cars is on the wet track while racing anytime I stop once in the 2nd lap. I skip the replay from the race in GT mode and then save the replay to the memory card.
Once thats done I go back to GT mode then Replay Theatre, once in there find the saved replay and play it. If you want to take a photomode screen in the replay your playing through Replay Theatre press select and the modes, and stuff in Photomode comes up.
Right thats as best as i could explain how I did it, you can also save a replay from arcade mode and do the same. By going into Replay Theatre playing it and pressing select during the replay.
Hope this has helped you out mate.