It's possible! You just have to drive three times on your own map with new created profiles: Gold, Silver and Bronze. Select them and drive a time on your map, save replay after arriving the finish. Then you have the times saved on your computer. Don't forget to write down the times of the replays. Later you'll have to write them in the rewards list (Gold, Silver...). If you upload the track later on TMX you can also add the replays called Gold, Silver and Bronze.
