Hi Martin,
You can use TOAF to "pair" a new or used PCB with your BCU, this will get remote locking/unlocking working. Here's some instructions:
https://the75andztclub.co.uk/forum/s...62&postcount=2
You'll need to use the old version of TOAF though (version 0.5.00.43). Be sure to make a back-up of the module before making any changes, just in case something goes wrong.
The transponder chip and EWS (immobiliser) are a separate entity though. For that, you'll either need T4 (I assume it can do this, never used it myself) or something like an EWS Editor Lite. This needs to be a brand new chip, you can't reuse an old one.