Complete the beginning interviews and draft etc. Once you are on a team, play or simulate the preseason. Then, on your NFL superstar home page (apartment, loft, or mansion) go to your "Rookie Handbook" and save the game. After you have saved, go to your "City Map" screen. Go to your agents office and request a trade. You can do this 2 times. If you are not satisfied with where you are, do NOT save and exit your NFL superstar. Load your superstar and you will be on your first team again. Keep demanding a trade until you are on a team you want to be on. (It took me maybe around 6 tries.)