I already have gospelkeys 202 and play by ear. I just havent mastered learning all the chords that go with the bass notes. I am very familiar with that link too! 
How do you play by ear and not know what chords go with what bass notes?

In GK202 Jermaine tells you what chords go with the 1, what chords go with the 2, etc, etc.
Maybe taking those examples and applying them in every key will help.
In any event this link should be very helpful:
http://www.learngospelmusic.com/forums/index.php/topic,54763.0.html