Instead of editing the above post..
It worked !
What did I do to make it work finally :
- use 4 ground wires
- long q wire (3-4 times longer than the other wires)
- use D0-GND switch for half a second when turning on
- using the new infectus + usb part
- using Amoxiflash 0.5 on my Macbook Pro (OSX 10.5.7)
I got a lot of "Warning : ECC error in flash" messages, but I think it corrected them all because it erased the flash part and then programmed again.
Took about 2 hours for the entire flash (528MB).. and it worked
In retrospect I don't know what the failing factor was, maybe it was the Infectus itself, maybe it was my XP machine, maybe it was Amoxiflash (which is the program Nand Flasher is born out of.), maybe.... something else. Good thing is that it finally worked.
Thanks for all the good tips and help, Erik, really appreciate it !