It might work, if Sony hasn't implemented the correct checks. TROPTRNS.DAT contains header and 5 sections. Second section is information about PSN account, which is empty when the account was not connected to PSN when you got the trophies. Section 3 on another hand is Trophy Summary and this block has checksums that are unique from account to account. Not sure if Sony checks them, but they are there. What certainly work is if you overwrite 0F0 - 28F with your own information. If you don't have your PSN account information in correct place then I think the trophies sync but the dates are missing. Which doesn't look correct for online trophies.