The stalk should be a straight swap, just that there are 2 extra pins that will not be on your current stalk which are for the button on the end.
Probably depends which specialist/dealer and who you talk to on if they will understand what needs to be done, should be a case of enabling trip computer in the BSI/ECU functions on Peugeot Planet, i'm hoping to get to try one out one weekend to see how exactly it works
1997 2.1 TD Exec (Sold)
1997 3.0 V6 Coupe S (Sold)
2001 406 HDi 110 GTX (Sold)
2002 406 Coupe HDi SE (RIP)
2003 406 Estate HDi 2.2 SE (Sold)
2003 406 Coupe HDi SE (To be sold)
2001 406 Coupe 3.0 V6 SE
2003 406 2.2 HDi SE