2.5-2.00 DOWNGRADER
By jgamer509
Ok I suggest that only people with firmware verson 2.5 try this becuase that is the only version it has officially been tested on. This works much like the FW 2.60 downgrader except it uses the complete 2.60 update, no changes made, which allows it to bypass the error screens. As with all exploits there is always a small margine for error. I take no responsibilty if this causes damage to your psp.
What this requires:
-2 Memory Sticks 32mb or higher
-A Playstation Portable Entertainment System.
Here are the steps to the Downgrader:
1. Back up the files on both your memory sticks
2. Format both memory sticks so they look exactly the same
3. Put the Eboot contained in the Memory Card #1 folder into the PSP>GAME>UPDATE folder on your 1st memory stick. The word UPDATE must be in capital
4. Put the Eboot contained in the Memory Card #2 Folder into the PSP>GAME>UPDATE folder on your 2nd memory stuck.
The word UPDATE must be in capital
5. Put Memory Stick #1 into your psp and connect your electricity cable. Keep Memory Stick #2 Nearby
6. Start up the 2.60 update and keep accepting until you get to the EULA (End User License Agreement) screen.
7. Now when your at the EULA Switch the Memory Sticks. Put Memory Stick 2 into your psp.
8. Now complete the update like a regular update.
9. At the end restart your psp and you will get a blue screen error, just hit O and welcome to the world of homebrew!
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