Oh, i really didn't even check it. I thought that i couldn't have upsetted the one who's asking questions, i am just usually happy if my threads are alive and people post. My bad totally. But "get a life and go ruin some other message board", please.
I hope you get some good tips. Shooting horses shouldn't differ from shooting any moving subjects, there's lot of info on that. Key is in the motion, stick with slower shutter speeds when you want to get motion in the image, you can use the tricks of panning.
Also when metering with spot or center weighted remember to compensate the horse color, if the horse is white +2/3, if the horse is black -2/3. Camera metering always tries to make everything grey ( sort of ), so that's the way to get more accurate exposure, but you have to take into consideration that even the canon spot meter isn't really a spot meter, so this is not exact science.