93 PA ABS Brake bleeding

I've got a 1993 Park Ave that is in great shape. It was litterally owned by a little old lady who sold it to me for $1,000.00, because she couldn't see very well any more. 54,000 miles on the odometer.:p

The ABS light came on a while back, and I never bothered to get it checked out.
Presumably unrelated, the master cylinder went out. The brakes seemed solid, but the pedal would slowly sink to the floor at a red light.

I've bench bled the MC, installed it, and bled the brakes in the proper order, but the brakes feel too spongy. The 93 should be bled like any conventional system, right? I'm going to go at it again with a couple more containers of fluid & spend more time at each wheel.

Click Here (http://www.autozone.com/az/cds/en_us/0900823d/80/17/fa/f2/0900823d8017faf2/repairInfoPages.htm)for more info on bleeding the system. Did someone change the brake pads during the last year? If so, it could be that they compressed the calipers without opening the bleed screws, therefore, forcing contaminated fluid back into the MC & ABS.

I don't know the history of the car that well, but I did get the brakes bled.
My 9 year old assistant was not very experienced with the "up, down" procedure, but he showed great improvement today.
So yeah, my ABS brakes are bled the old fashioned way, thank goodness.