@Pure_BY, You can use the next pattern to fine-tune the relation between the rating of the track and the chance of it to be played.

(%rating% IS 0 AND "$mod($rand(),100)" GREATER 75) OR (%rating% IS 1 AND "$mod($rand(),100)" GREATER 25) OR (%rating% IS 2 AND "$mod($rand(),100)" GREATER 25) OR (%rating% IS 3 AND "$mod($rand(),100)" GREATER 75) OR (%rating% IS 4 AND "$mod($rand(),100)" GREATER 90)

Explanation : for example (%rating% IS 1 AND "$mod($rand(),100)" GREATER 25) means that if the track's rating is 1 then the chance for it to be played is 25%

If you totally don't want to play the rating 1 tracks replace the "rating 1 part" with (%rating% IS 1)

You can take the pattern and change the "weights" of all the "rating parts" as you personally want.