To quote from his site (linked above), roughly translated:
Here I bring the new version.
• Code optimization.
• Fixed USB port allocation.
• Fixed black screen.
• Only have a USB MASS STORAGE USB connected to load FIRM LOADER.
• UPDATE NO FIRM while in USB mode LOADER.
Thanks for reporting bugs!
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
It very useful because instead of messing around with your flash in PS3 you can do just "soft mods" to it's copy in USB dive avoiding thus pemamently damaging your PS3 - useful for testing and playing around with zero danger to your PS3
Haha! It's a bit trickier. How the update works is as follows:
Once there is a new firmware downloaded it unpacks it and does the very same trick the Custom Firmware Loadrer does (that's why it is possible at all BTW): it starts it! Then it stats in "upgrade mode" which is flashing the firmware to the main flash.
What we need to do is: do the Custom Firmware tsick but in the "upgrade mode". Then the mail flash would be flashed with the firmware that we provide (either 3.15, custom or 3.50 but the later might not be wise anyway.