To sign up you simply pick out 9 different horses from the current lineup and place them in the order you wish that will correspond to the horse squares listed below in numerical order. Then submit it to Brian and make yourself a Bingo Card accordingly.
Starting Saturday May 2nd if you have the horse that wins on your card, you can mark it and if you eventually get 3 in a row vertically, horizontally, or diagnally, you'll be a winner if you are one of the 1st three to report.