I'm starting to get mixed up aswell, between these 2 threads, and private emails about this, so I will post here what I just posted in the other thread aswell - though looking at it, - the same applies to RRHSG if he gets there first...
Yes, the Nanocom will do what you need it to.
Gilbertd - apparently the fobs aren't syncing up, so there must be issues with the RF somewhere... but as far as Nanocom is concerned, if you just go in and switch off the passive immobiliser, it should stop the need for the EKA when trying to unlock in the drivers door. Though, it might also be worth checking the drivers door latch microswitches in Nanocom (BECM->INPUTS->DOORS/LOCKING from memory) as it seems double strange that sometimes it needs the EKA but sometimes it doesn't, and sometimes it accepts the EKA and sometimes it doesn't.
When the BECM was here for unlocking about 6 months ago, I checked the fob codes against the fob that was sent, and they checked out against what was stored in the BECM - so everything should work as it was originally intended. Though I don't know what the mechanic who had the vehicle for so long has done to it in the meantime!
'06 4.2 Supercharged Black/Cream "Jess" -- Bought April 2021 (NZ)
'01 4.6 Vogue Black/Lightstone "Snog" -- Bought Jan 2012
'99 4.6 HSE Cobar Blue/Lightstone -- Sold March 2009
'95 4.6 HSE Epsom Green/Tan -- Traded June 2008