You should have not updated to 4.2
THERE ABSOLUTELY
NO point.
You're upgraded to Boot2v4, removes HAXX ticket along with DVDx (These are able to re install though
)
Removed Preloader suppport since System menu 4.2 runs on IOS70 (Which is the only new IOS)
Most IOS' are updated.
IOS60 is a stub now, I'm pretty sure you have to delete the stub IOS's that nintendo put up to block cIOS's, you cannot downgrade anymore, and if by any chance you have boot2v1-3 (Before you updated) then you have a chance of an unrecoverable brick. (Because nintendo made an extremely buggy boot2 code to update)