Ok here are some ideas for the pedal 4 that lowers 5th and 6th strings a whole tone.
(harmony scale from G to C)
3._____________
4._____________
5.___3(4)~3~~3a
6._3_3(4)~3~~3b
7._____________
8._3___________
(some chord changes and movements)
G Em7orC9 chord
3._______________
4._10~~~~~~~~~~~~
5._10a~~10~~10(4)
6._10b~~10~~10(4)
7._______________
8._______________
G7 G6 G7 G6 G7/9 C
3.______________________
4._8L~~~~~~~~~~~~~~~~~~8
5._8~~~8~~8(4)~~8~~8a~~8
6._8B~~8~~8(4)~~8~~8b~~8
7.______________________
8.______________________
That is pretty basic and gives you the idea and theory behind that pedal 4. But doing these moves and understanding what the notes are and their value to the chord and where they are going by using this pedal; will help you add and use this pedal more in your style of playing..."you might even come up with some stuff for yourself that works cool for you.
Have fun and hope that helps.
Ricky
