(adsbygoogle = window.adsbygoogle || []).push({}); Heres is Custom Firware Loader 0.3
the creator claims this gives the ability to load custom firmware
but i havent tested

Heres The Link
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and here are a list of original ps3 FW you could test with
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This is for use with Jailbreak

totally impossible...
the socalled CustomFW is stored on the USB stick!!!
Also dev_flash is not the whole firmware

Its was just an idea, Trying to help.
I`m not going to make the jailbreak, I am going to buy and use when it comes out for V 3.50

shiver if this is real then would it not be possible to boot an alternate firmware version(I Just Skimed)

Totally True

Not even 3.50, we need at least one firmware above 3.41 to allow us to run the games that have the compulsory 3.42 firmware. The only reason we are able to do the jailbreak on this firmware is because of the test mode that Sony put into the Firmware. Otherthan this hiccup, Sony's 4 million security system seems to be standing strong.