PSP 1.5 kernel addon for 3.90 M33 , 3.93 M33 , 3.71 M33 and higher

1.5 Kernel add on enables you to play homebrews on your PSP. This is only for the Phat / Fat PSP (series 1000) and cannot be installed on the Slim . This add on is for fat PSP's with custom firmware higher than 3.52 m33-7 ( viz. 3.71 M33 , 3.80 M33 , 3.90 M33 , 3.93 M33 etc. )

If you want to install 3.90 M33 on your PSP look at this tutorial here

Tutorial :

1) Download this pack here. or alternate torrent link open with utorrent or similar program

2) Open it with WinRAR ( not winzip) if you don’t have WinRar download it from

3) Connect the PSP to the PC. Open with winrar and Copy the PSP folder as well as the 150.PBP file to the Root of your PSP. If it asks you whether it can over write click on “YES”. Note: the Root of the memory stick is the drive that pops up when you connect your PSP to your PC eg removable hard disk (H:) , (I:) etc, its the place that contains the PSP , ISO , MP_ROOT folder , if you still don't get it see the picture here.

4) Scroll to game and click on the blue green "1.50 kernel Addon for 3.90" click on it accept the agreement and thats it done . Enjoy.
NOTE: Remember to go to your recovery mode >
Choose configuration > Game folder homebrew and set to 1.50 kernel .


1) I have a 1.5 Kernel addon Problem , I have a fat psp and every time I press X to install it says that 150.PBP or 1.5 PBP firmware was not found ?
Answer: Downlaod My Pack again , and make sure you follow the step (3) of this guide correctly . You have to copy both 150.PBP and the PSP folder.

2) Dark Alex has 2 versions of 1.50 kernel , which one is this ?
Answer : This is the latest one (v.2) and works great ... no problems.

3) My PSP shuts off , The installation goes back to the XMB after I click on the Icon?
Answer : You either have a PSP Slim or the files are nor correctly place or you might not be having custom firmware on your PSP.

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