Here's the tutorial.

The files you need are;
1. AN untouched DBZ Shin Budokai ISO.
2. MPH Gameloader 1.1
3. The most recent UMD emulator
These files are available at psp hacks

4. Firmware 2.00 FLASH0 files
5. Firmware 2.50 KD fild http://www.megaupload.com/?d=9W813WSQ

Assuming you have gameloader 1.1 and umd emulator on you psp correctly heres what to do. It is a very simple process.

1. Copy the KD folder
2. Open the FLASH0 folder
3. Paste over the KD folder from the FLASH0 folder
4. Put you iso in the iso folder and run the game using the umd emulator + mph gameloader method.

Now there is no reason to edit DBZ in any way but you can still cut out the update file to save space. This is my first post and i've figured it out.

I made this from all the other instructions around.