Step 1: Connect via FTP and get your dev_flash
Step 2: Move your dev_flash and the nXMB into a new folder (NOT THE CONTENTS, BUT THE DEV_FLASH ITSELF).
Step 3: Open nXMB and let it patch your dev_flash
Step 4: Copy the contents of that dev_flash to your USB Flash Disk
Step 5: Launch USB Firm Loader
The PS3 will mount your USB flash disk as dev_flash
You will NOT see "Install Package Files" but instead of that you will be able to boot PS1/PS2 games and you will have access to your memory cards!
If you wish to view my old thread that led to this app it is located HERE. Currently trying to make 'Install Package Files' also appear in nXMB!
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!
At this point, ALL this does is to restore playing PS1 and PS2 originals from disk on a JB'd PS3. It's exactly the same behavior as one that has been booted normally. Hopefully we can get improved features in subsequent releases.