Ultimate Flash Operation is a flasher for PSP, cfw 3.30/3.40 OE-A, IE-A, LE-A, with many features.

Changes:

–Fixed major bug, not allowing you to backup your files, and making 3.51 M33 access the wrong files
–Displays 129×99 screenshots now
–Beginning Backup only shows up if you don’t have a backup in the themes folder
–Support for flashing of all files in VSH/RESOURCE
-added:
auth_plugin.rco
common_plugin.rco
dd_helper.rco
game_install_plugin.rco
htmlviewer.res
osk_utility.rco
loadcore.prx
loadexec.prx
–Above also added in Mix n’ Match mode
–More support for 3.51 M33 Mode – won’t accidentally flash incompatible files.
–Code improvements (more stability)

http://forums.qj.net/f-psp-development-forum-11/t-updatereleasebug-fixesufo-v21-114995.html