Help Needed: Simtec 56.5 2001 Vectra B Immobiliser

[AngryDome]

G'day,

I have a 2001 Vectra B with the Simtec 56.5 ECU. I've attempted to use carprog to get the pin code of the ECU but it seems the 56.5 is not supported that way.

In essence I am trying to either:
A) Remove old keys from ECU and program in new keys, or;
B) Disable the immobiliser

What options do I have? I'm new to dealing with car ECU's (prefer older cars with less tech haha), so not sure where to go from here.

I have attached a couple screenshots from the Vaux-Com program showing the details of the vehicle.

Any and all help is appreciated.