Well, sorry to dissappoint you, but you can not! There is only 1 dedicated fx processor on most super-jv's except the jv2080 (which has 3). So you can only use 1 EFX for one or more parts + reverb and chorus.
you can however create some effects yourself. the key to this is good patchprogramming.
I always make a complete midi-sequence and before the mastering process I record each individual track in patch mode (with FX).
and then I remix to balance the altered spectrum of the sound.
hope to've been of help
Bas