help with Mark Hammer's Woody pedal

[smoguzbenjamin]

Hello guys,

I'm working on mark hammer's woody pedal, but it seems it needs a bipolar PS. I'm putting it onto my breadboard, but I'm not sure what to do. Can't I just give the opamps 4.5v instead of 9v? Or should I apply 4.5v to the unused inputs? I still haven't really got opamps down, I really should study some more sometime, haha.  I'll only be using this off a wallwart, so I don't really ned batteries anymore... :roll:

But anyway, what should I do?