Part 1 [Rar: 252 MB]
Part 2 [Rar: 252 MB]
Part 3 [Rar: 252 MB]
Part 4 [Rar: 252 MB]
Part 5 [Rar: 252 MB]
Part 6 [Rar:127 MB]
Password: isosandroms

Region: USA
Filesize: 1.53 GB

Works with:
5.50 GEN-D2

For all other firmwares, you need to install the khbbs plugin:

Download this file
Extract to any directory
Copy the contents of the KHBBS to the SEPLUGINS folder at the root folder of your PSP’s memory stick (if you already have plugins, modify the respective text files)
If your PSP is hackable, restart it, otherwise proceed to the next step
Load the game.