I applied the hibernation fix, but this made no difference.
Thinking that maybe I had messed something up during the install I started from scratch:
1) installed snow leopard 10.6 from USB image with no issues
2) Downloaded EDP 1.9.2 & installed
3) Ran EDP and:
a) Pressed 1) for kext configuration
i) Selected 1 for D420/D430 dual core, 1 for mouse, y for nullCPU, y for sleepenabler, 1 for battery, y for emulated speedstep
ii) Retuned to main option screen
b ) Pressed 2) for Fixes
i) Selected 1 for Touch/System/Library/Extensions
ii) Selected 2 for hibernation fix
iii) Retuned to main option screen
c) Pressed 3) for installer
i) Selected 7 to install Chameleon SVN2.1 1684
ii) Returned to main option screen
d) Q to exit
e) Reboot
f) Entered BIOS A09, checked defaults set and system password set, saved and exit BIOS
g) Once back into 10.6, press power button and choose sleep option from window. Screen blanks, fan continues to run and green light in power button stays on. Can not resume from sleep - only way to resolve is to press and hold power button until switch off and then restart.
I then re-ran EDP and at step 3) a) i) chose the same options but for nullCPU instead of y I chose n and reboot, sleep then works as it should, but the laptop runs ~10 degrees hotter.
I would really appreciate any help with getting nullCPU to work with sleep.
Thanks