Did you get any update from CIC after you updated the passport details? And whats the status of your friend after sending the passport when he got the PPR?Same is the case with me.
I renewed my passport and raised a CSE for the same.
How to do this?
1. Click https://secure.cic.gc.ca/enquiries-renseignements/canada-case-cas-eng.aspx
2. Mention all what's changed, e.g. address, passport num, etc.
3. Hit 'Next'
4. Upload the relevant passport pages
[EDIT] Don't wait till PPR for updating them. One of my friends received passport number mismatch after PPR because his old passport was no longer valid and he submitted his new one.
Hopefully timelines dont shift, if only the passport number has changed.
Could you please let me know, because I am still confused reading all the threads whether to update them or wait till the PPR and send both passports at that time.