That's a nasty one, it's good the insurance company said its repairable but they may come back to you and say it's not after all. Lovely looking car and glad your ok.
They shouldn't need resetting as long as you don't turn the ignition on whilst the seats out. I had my seats out the other day and when I put it all back together and turned the ignition all lights went out. Also the seats aren't that heavy, I've got a totally knackered back and I got mine out!
To do it you need the facelift dials (obviously) and the white control box that sits behind it (with the ribbon on). The back of the dials have to be cut, it's the lugs if I remember correctly so are useless for anything else afterwards. The back of the gear surround plastics have to be cut as well and a bracket made to mount the new dials to. It's been a year or so since I did mine so I might of forgotten something.