You need to install it with ids, module initialisation iirc.
You can clear crash data, airthies did a how to too
The problem i has was i went into rcm config and clicked on it for a laugh, it upgraded my rcm to twin airbags and i couldn't downgrade it
A few of us have done it lol very easy to do.
Since you have twin airbags then i would say that 1 of my modules will fit, although it may be possible that it could be A- single low spec B- double C- double and side (just guessing at the moment tho.
If this is the case then you'll get away with doing the above and fitting a double and bypassing the side system, although that seems a bit pointless if you can get hold of the correct module.
I have looked at the rcm diagram and it seems straight forward, single and double airbags are top side of rcm module and curtain airbags are bottom side of module.
If the middle physically has all the pins populated then you stand a good chance of sorting the problem out.
However, can you specifically tell us what happened to your rcm? Did you reprogram it by accident?
Comms fault isn't consistent with air bag/system v component failure so something has gone wrong somewhere.