Copy paste from
http://www.cic.gc.ca/english/information/applications/guides/CIT0002ETOC.asp
3. Biographical page of passport(s)/travel document(s)
The biographical page means the page that has your name, photo, passport/travel document number, issue date and expiration date.
Provide photocopies of the
biographical pages of all passports and/or travel documents (valid and cancelled) for the six (6) year period immediately before the date of your application, or since you became a permanent resident, whichever is more recent.
Also, provide photocopies of any renewal pages of the passport(s)/travel document(s).
So my suggestion is to present copies of the valid current and expired passports, and do not try to use the forged ones.