Sure, this is what they were asked for and submitted (all were scanned into PDF, except the IMM5257 application which was "digitally signed" to include the barcode):
• IMM5257 Application
• Marriage Licence/Certificate
• Authority to Release Personal Information (IMM5475)
• Itinerary, Travel
• Additional Family Information IMM5645
• Purpose of travel - Other
• Passport or travel document
• Proof of Relationship (scan of my birth certificate)
• Business Registration
• Use of Representative (IMM5476)
• Invitation Letter (I provided that with all the details listed on CIC's website. Google "CIC letter invitation")
• Authorization for family member IMM5713
• Proof of Means of Financial Support
• Digital Photo
• Travel History
Cheers