If you don't have enough PSP know-how, back off. Now! You could end up having a bricked PSP if you're not careful. This application by Art could alter as well as create a custom firmware for your PSP. The original Dark_AleX Custom Firmware modification does not work under MPH firmware launcher.

Changelog:
Additional 'old school' screens added to the credits demo including equalizer style music visualization, media player style music visualization, fireworks effect, vector objects, and spinning circles.. all in ASCII!.
- Home and Start buttons can be used for program controlled exit.
- Select button is a shortcut to the XMB Menu Label Editor.
- Real time checking for activated USB mode. Program will not run if
it is launched or resumed from a shell with USB mode activated.
- Startup checking of available RAM. Program will not start if over
2Kb of RAM is tied up by another application.
- New Easter Egg for this version has been given away in the thread.
- New Icon and accompanying AT3 loop.
- Programming optimization.

This early, he already has plans on what to put in Build 6. His to-do list includes:
- Detection of iR Shell module (thanks to AhMan for the method).
No possibility of launching X-Flash from within iR Shell.