Hold it Hold it............all u wana do is replace the HDD right..? then why are u re-applying the firmwares...? :| the firmware itself is flashed to ps3....not on the HDD..
all u gota do is just swap the HDD's n then format the new one...
easy...
about ur trophies.......thats not gona work........trophies can only b saved by synching them to the server...
i dont think re-building data will help u...
backup utility option saves everything from ur ps3 to a backup drive.....all ur settings , saves n stuff...
hope i helped.....if ur still confused about something then ask me..
and about the heat issue.....dont worry.....i believe a slim wont really raise an issue wid the heat..