Yeah, well I wish we don't have to send anything. This is what I found on CIC web site:
http://www.cic.gc.ca/english/resources/tools/perm/express/final.asp
http://www.cic.gc.ca/english/resources/tools/perm/express/final.asp
"Applicants from visa-exempt countries
The ‘Passport Request' letter instructs the applicant on how to send a photocopy of the bio data page of their passport and, if applicable, the bio data page of the passports of their accompanying spouse and dependent children."
The ‘Passport Request' letter, therefore, includes a request for hard copy photos. Applicants are instructed to mail these photos to CIC.