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: CFW Folder Blocker v1.0
Visit: QJ.NET PSP Development Forums

UPDATE Torch warns that you should disable to this plugin if you want to use DAX's LEDA app. Says Torch:

EDIT: Before anyone asks, this will NOT bypass any anti-ISO protection in games. It is for the protection of YOUR files on YOUR memory stick. Use the original UMD and it will work fine, and your files are also safe.

Note: If you want to install DAX's LEDA then disable this temporarily to install it or it will show error. In the next version I will add a check to disable it in homebrew.

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More from Torch:

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• Hold v3.6 battery saver now has Fast Music Scroll