Backup Manager and any other application is still installed and you can see it in XMB but you can't start it because you can't run unsigned code on a non-jailbreaked console. So no, you can't upgrade to 3.42 and still run unsigned code. Maybe later when/if there comes a hack for 3.42 but not now sorry.
After having struggled a bit, I set my ps3 to Europe (which is the proper region the ps3 is in and probably comes from) and the application started... no more "no request event" error, problem solved.
Thanks for this app and for letting me know it should work on debug ps3s, it made my day...
Using tools made by gibbed for the pc and xbox360 you can mod Just Cause 2 by extracting and modifying the .bin files located in the .arc's.
I quickly made a 'mod' to change the price of the blackmarket items within the game. I havent tried it with other games yet but Oblivion has a fairly extensive OBLIVION.INI file that is easily edited.
Uncharted has a file called prototypes.txt that lists several hundred options, looks mostly related to sound though. Another looks like you can change the camera position during cutscenes.
Is there a thread that people are discussing modifying or editing games?
I am also interested in this, as I am eager to get some "mods" for the ps3 going