I have done this exact thing in the past, but anymore it is not worth the time IMO. It is a lot easier to just look at a recruit for a minute and compare him to others. Especially since it is all about potential and not ratings in recruiting now a days.
Plus it is very subjective. I put more weight into IQ then most people would. I mean I would be happy to give you an idea of what categories I would value over others but it is really worthless to do without knowing a players potential.
Are you trying to decide which players to start/come off the bench or which players to recruit?