Update: It’s fake – go figure… Read this (click for screenshots too):

I have installed this request and looked all the innards.

This is not 5.55 CFW.
It is 100% 5.50GEN-B2 with some files from the folder VSH of 5.55, which are responsible only for displaying the graphical interface.

So I checked the IPL – it is 100% identical 5.50GEN, although it should be from the official kernel 5.55.

So I checked the Pre-IPL – he is also 100% identical 5.50GEN. This loader cfw containing the BIOS file path activation, including the main executable file cfw: systemctrl.prx. Pre-IPL (16kb) basically contains file pspbtcnf.bin.

So it is no way 5.55CFW, but simply a hybrid.
It’s not what you run games that require 5.55 can be no question.

The problem it is that he does not decrypt add files that have signed and attached to a particular PSP. They must decrypt, and then pack it with a universal header.

If he did not have this knowledge, about any issue 5.55CFW, and even more so 6.00CFW generally speaking it is not necessary.
And it definitely will not!

So it’s all fake!!!

Download pulled.

Womp waaa… Don’t download this one – not yet anyway… I just copied this mess of files onto my memory stick, ran the 5.55 LDX installer, and within a moment or two I was holding a nice brick.

*Chucks it through Team LDX’s window*

No – but for real – good effort. It’s more than a video, I’ll give it that. Keep in mind the team claims this beta and surely that explains my now Pandora-fixed PSP. Back to 5.50 GEN-B2… By the way, I was still able to access the LDX recovery menu by holding R-TRIGGER on boot.

And now that I’m looking at their screenshots (more via source), I notice my LDX Recovery Menu was missing the “Reboot in to official firmware”, “Suspend device”, and “reset device” options.

Furthermore, Team LDX says any game (or ISO) requiring 5.55 or higher does not run, not yet *yawn*… That’s to be resolved in the full release. Anyway, should you feel inclined despite my experience and all that other stuff…

BE WARNED / USE AT YOUR OWN RISK:

Downloading and using this may possibly render your PSP a brick, and even worse, possibly render your non-Pandora-supportin’ PSP an even bigger brick – a cinder block.

The full version due is out September 24th. Check back.

Download: Custom Firmware 5.55 LDX BETA

Thanks for the e-mail, Johnny Boy.

- source: mcpsp