1. Switch engine off & remove keys
2. Lift up seat unit
3. Cut around the "do not remove sticker" where the round lump is
4. Prise out round bung that you just cut round
5. Identify fuel chip in the socket and note which way round it goes (should be a "notch" in one end)
6. Remove chip carefully and level to avoid bending pins
7. Insert new chip carefully ensuring all chip legs locate into socket
8. Push chip firmly home into socket
9. Replace bung
10. Put new sticker on top
11. Put seat unit down
12. Take keys out of pocket and test!

Here's a couple of pics...

an example replacement chip:
http://www.jimmy540i.com/ducatichip.jpg

the right-hand side shows the chip located in the ECU:
http://www.jimmy540i.com/ducatichip2.jpg

As ever on this site an answer from the top draw,

many thanks.

If it's like mine was, you'll spend half an hour trying to get the plastic rubbery muck off the chip that is in there at the moment to get it out.

If you have hands like a girl it might take less time!!