"Official Style? What does that mean? In the readme, he calls it SCE Style. In the forums, he explains that: "This new trick tool uses the similar installer that is used in official firmware updates and newer M33 updates."
Official Style, SCE Style - I'm sure you get the picture. Here are notes from the readme:
* Uses a brand new GUI. Similar to the ones used in official firmware updates.
* A simple tool that tricks users into thinking they've bricked their psp unit when flashing a firmware (5.00m33)
* Use this to trick your friends and scare the daylight out of them!!"