Not sure if this is useful, but I've searched the web many times in the past for this and just wanted to post my conclusion to this one.
I did the stupid thing of disconnecting part of the SRS without disconnecting battery (and waiting for drain), so by removing the centre console caused the SRS airbag light to be on and the passenger disable button flashing.
At the time I didn't have the updated opcom or access to another Vaux reader, so lived with it, and can CONFIRM the light goes out itself after 2 MONTHS!
So if you are patient (And don't have MOT looming) you can wait for it to self-extinguish.
Hope that helps somebody!