each monday in the australian newspaper race results they list all the listed and group race results for australia and new zealand.
i put all the placed horses in a database with the name,date,distance,track conditions,and class e.g. group 1 win = 1 group 1 placed = 2 group 2 win = 3 placed = 4
up to listed.
and then when races are abnormal prizemoney such as eagle farm on saturday where there were two of $50,000 i rate as 7a and 8 b
listed is 7 and 8
e.g. our fabio won on sat as did ski the tide and fires of ireland all of these 3 came from 7a and 8b races on 8/2/04.
not a bad bit of classing eh?
i also do a handicap calculation on them auto in the program which i call my "swing weights".
hope this helps. the method simplifies my workouts and makes it a bit of fun rather than a huge chore.
regards