I'd just like to say thanks to all the people for posting info on install/upgrades and help files been posted here. I've (soldered) justed installed a D2pro V3 on a D2B (5 wires) on my euro Wii. Wii OS 3.4e and upgraded to Firmware 1.7. No issues, it works fine and first time!
So now I'll be looking at the HB forum.
Once again, thanks.