The thing is, I have found a toolkit of some sort (http://www.ps3hax.net/showthread.php?t=50388), that is supposed to convert the PS3 save file into PC save files, so that you can edit them the PC way and convert them back to PS3 format.
This would be great, but does it work? I have heard most people say that you can't fix broken quests on consoles, so I'm not sure whether I should try this or not.