PSP homebrew developer KIWIDOGGIE passed by our forums recently to tell us about his released app for the PSP, KFWFlasher AIO Mod. It's a fully remade of KFWFlasher and he mentions that his work on the app isn't complete yet, but it could already do the following stuff for you:

* Flash Gameboots(no MB limit)
* Backup Your Current Gameboot
* Backup Your Flash 0
* Tell You How to Use It

Since the app doesn't come with a readme file so you'd have to launch the program and go to help for you to get the instructions to use this. Also, be warned that this writes and reads from and to the flash, which means that there is a very small chance of bricking your PSP. The dev won't be responsible for that, so to avoid any inconvenience, be sure to check out and understand that how-to. So far, the dev says that this works on firmwares 1.00, 1.50. 2.71, 2.71SE,3.xOE-X.