Update: A quick bug fix:

• Fixed a bug in usbhost iso redirection, now normal mode (umd inserted) is working great. No need to change anything in recovery, if you want more compatibility, just put an umd in the drive before using usbhost iso redirection, else do not put any umd. (thanks psp.padawan for our sharing)
• Fixed a few bugs regarding usb mass storage. (thanks madridi4ever for all the reports)

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Cpasjuste is back with a new version of Custom Firmware Extender — a set of plugins for custom firmware 3.71 M33 that will add some extra options to your PSP. This update packs in quite a few amount of changes:

• New usbhost iso redirection method, if an umd is in the drive, “normal” mode will be selected automatically, if there is none, “oe isofs” will be selected automatically. Note that the “normal” mode seems to have some bugs, sometime it will work, sometime it won’t work…
• No more save game problems while using usbhost iso redirection.
• Remotejoy is working again under game, this allow, in addition to the use of the inclued remotejoy_gui, to make some in-game videos.
• Vsh menu hook : you can set some “vsh menu icons” to load a specified homebrew, take a look at the cfe.config file for examples on how to use it.

Make sure you read through the readme first.

Download from MyDediBox