Ok, I've tested this myself and its working fine.
Changed the resistor value to 1580 Ohms.

Before VDROOP:
BIOS 1.5250V - IDLE 1.5V - LOAD 1.39-1.4V
Q6600 3.6Ghz Unstable and hot

After VDROOP:
BIOS 1.4875V - IDLE 1.45V - LOAD 1.41-1.42V
Q6600 3.6Ghz Orthos Stable

The vDroop is still there with 1.58K Ohm but it's much better! Maybe lower resistance would help, but a little vDroop is fine for me