J@ricanese has released a useful Windows utility for previewing PSP gameboots, music, videos, and photos, before transferring/flashing them to your PSP.
NPH App Beta 1.5 changes:
Fixed the PMF decoder install.
Forgot to mention that the app has shortcuts. These can be seen through the menu.
Also forgot to mention that you can dynamically rename a file within the program.
Fixed loading issues with the shortcuts and menu links.
Added more menu items
Added type (file type) column in the main table.
If NPH App detects X-Flash installed on your PSP, transferring new gameboots will be copied to the correct destination for flashing; otherwise, they’ll be left in ms0:\NPHAPP\Gameboots. There is more than meets the eye to this app, so be sure to read “readme.txt” for exact details and usage.