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!