interchangeable

Would it be possible to make and sticky a list of interchangeable parts for the Mille? I.e. footrests from a '99 model will fit an '02, headlight from a '99 model will work on an '02 model but will need a '99 top fairing. Thought it's be a good idea to have all that info in one place that can...

I have an 02 Mille RSV-R with a dead engine, I've read aprilia used the 'same' engine on various models & was wondering if it's really exactly the same, and which models/ years I can go for if buying a used one?

Can anyone tell me if the old Tuono/RSV seat will fit the Gen 2 Tuono? (looking at altering the seat) And would the old one piece rear fairing/tail piece from the 2004-2005 RSVR fit the Tuono? (Track bodywork) Thanks :cheers