EDIT - need a verified and surefire wiring diagram - 2 humbuckers, 2 vol, 1 tone, coil split, toggle | The Gear Page
Seymour Duncan - Here's a fun wiring mod which is especially great on Ibanez, Jackson, Schecter and ESP-style twin-humbucker shred machines. | Facebook
2 Humbuckers/3-Way Toggle Switch/1 Volume/1 Tone
Circuito | PDF | Electrical Components | Electromagnetism