Are you able to take an decrypted eboot from one of the games you installed on your external hdd, and then put that eboot into the files you got after using this iso2jb program and see if it works. It has to be the same game obviously.
This would work afaik, however I am unable to test this for obvious reasons...
Again, this WON'T work. There are two kinds of encryptions on ps3 games, one being disc layer encryption and the other being .self encryption (EBOOT.BIN). PS3 backup manager is capable of removing the disc layer encryption because a BD disc is transparent in lv2 (a.k.a, gameos). but you still have a retail-signed EBOOT.bin with media flag and all those goodies.
Since we have control over lv2, we need to code a program to dump the decrypted EBOOT.BIN in the background when an original game is launched.
PS3IsoJb.. creates the backup job creation via your PC.. with the ISO image disc.
tried downloading one... since i got Tales oF Vesperia PS3 ISO downloaded last week since the PSjailbreak reported... tried this one.. and it creates same file structure as you see inside the ISO file.
Every report I've seen suggests the tool itself runs and does what it says it'll do (creates the file structure, etc) but when you go to actually play the game it will not run because the eboot is still encrypted... so it's a step in the right direction but not a solution at this point.