PSP AiO provides you with various tools.

PSP AiO v3.1 functions:
You can use Pandora Installer, KeyCleaner, Xplora
You can update to a Custom Firmware like>5.00 M33-6, 5.50 GEN-D2 and 5.50 GEN-D3.

You can install CXMB on a Custom Firmware 3.71 M33 – 5.50 GEN
You can install an english or german Dayviewer v7
You can install Ultimate VSH Menu Revised
You can install Audioboost

You can use a UMD Dumper
You can view System-Informations

You can install 3 Gameboots
* Remove the sony logo
* Replace the Network-Update with a reboot.prx
* Install colorfonts on 5.50 GEN or 5.00 M33

http://forums.qj.net/psp-development-forum/166548-psp-aio-v3-1-released.html