We've picked up word that developer Red_Squirrel has just released the RS Psar Dumper for the PSP homebrew community's use. The author notes that aside from carrying the functions as the original Psar Dumper application (last updated by Team M33), this build also carries USBHostfs support.

This means that users can have RS Psar Dumper read EBOOT files from, and dump firmware directly into your PC. Red_Squirrel further notes these other features:

same features of classical PsarDumper (extraction of Firmware files from an Official Updater EBOOT)
Menù full of colors and more interactive
Add a new function to exit from the homebrew without forcedly do something (using SELECT key).
Add a function to activate/disactivate USBHOSTFS connection.
If USBHOSTFS connection is acctivated, program will show an advise in the case where PSP is not connected to PC or Usbhostfs.exe is not running on PC.
If EBOOT is not found, PSP will show an error (and NOT will crash!).
Program has 2 language files: if PSP language is set on Italian, homebrew will load Italian interface, otherwise it will load English one.
Homebrew will read the nickname set in PSP.
If RS folder is not found, program will end without crash.
Add a useful Windows Program to install easier the Homebrew on PSP.

If you have any particular questions regarding RS Psar Dumper, we advise you to view the readme included with the download bundle. Be sure to visit Red_Squirrel's release thread over at the QJ.NET PSP Development Forums if you've got feedback regarding the app.