Originally Posted by baargle
In answer to 3. This firmware will play backups from your internal\external drive no problem. But it needs proper encrypted original eboots to run. Any games you have that have "been fixed for 3.55 or 3.41" will need resigning again with their original keys. There's a thread here were a kind chap has made a utility that will do this for you.
Wrong...... all of my n0drm and Duplex etc fixed games are working fine in 4.21
(a couple have needed the game data deleted via xmb) just install the latest update and ur good to go
Showtime also works from xmb and within multiman