
Homebrew developer Torch has released CFW Folder Blocker v1.0,
a useful little plugin that hides CFW folders while in game mode.
Torch made the program to protect against new UMDs that detect and delete certain files,
messing up your custom firmware.
Here are the release notes:
Some new UMDs are detecting files in the ms0:/seplugins and ms0:/iso folders and causing problems, even deleting files from these folders.
This plugin will hide these folders in GAME mode so they can't be accessed.
To install,copy cfwblock.prx to ms0:/seplugins and make an entry in game.txt
e.g. ms0:/seplugins/cfwblock.txt 1
Download Here