Re: controlling the jockey
On the race screen when you are about to watch the race there is a drop down menu for jockey orders. The last option in drop down menu is "Take the reins". Choose that and, well, ummm, good luck. I have never been able to ride a horse right in this game.
How to jockey instructions here...
http://www.startersorders.com/phpBB2/viewtopic.php?f=13&t=9372