Ultimate flash0 free space guide! setting records! [updated 2/19]

Posted By: Sterist

The contents of this guide will consist of information NOT listed in most other free-space-guides.
This involves manual work on flash0 so I highly recommend keeping a backup of the file in question.

Useless files you can delete without concern of feature loss or the need to backup:



Unpopular XMB features taking space:



Fonts:



Relocating movable and / or customizable components of the XMB to flash1, flash2, or ms0:
DO NOT TRY FLASH3, it is NOT mounted during any mode on any firmware.
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One-time steps:

Download and install Hex editor:
Here.

Download the Official Sony Update firmware (pbp) which matches your current version.
1.50 Official Sony Update (pbp)
3.71 Official Sony Update (pbp)
3.80 Official Sony Update (pbp)
3.90 Official Sony Update (pbp)
3.93 Official Sony Update (pbp)
3.95 Official Sony Update (pbp)
4.01 Official Sony Update (pbp)

Download RS PSAR Dumper v3.5:
Here.
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If the file you're looking for is not on this list, that's because it hasn't been tried yet. Try it yourself and report your findings! Make sure you have your backup (which you will read about shortly) before trying anything though.

List of files which can be relocated:
flash0:/vsh/resource/01-12.bmp
flash0:/vsh/resource/impose_plugin.rco
flash0:/vsh/resource/system_plugin_bg.rco
flash0:/vsh/resource/system_plugin_fg.rco
flash0:/vsh/resource/update_plugin.rco

flash0:/vsh/module/impose_plugin.prx
flash0:/vsh/module/update_plugin.prx

List of files which cannot be relocated:
flash0:/vsh/resource/opening_plugin.rco
flash0:/vsh/resource/system_plugin.rco
flash0:/vsh/resource/sysconf_plugin.rco

flash0:/vsh/module/opening_plugin.prx
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1. Place the Official Sony Update (pbp) in the root of your ms.

2. Install RSPsar Dumper v3.0 (check the readme for install instructions, if it doesn't work after you installed it then refer back to the readme).

3. Confirm that your kernel is set to your currect firmware version.

4. Launch and decrypt all with SQUARE.

5. Acquire vshmain.prx from the location on your ms:
ms0:/Dump/F0/vsh/module/

*Highly Recommend* Rename the decrypted vshmain.prx to something other than it's original name, and place it on your Desktop.

6. Connect your flash0 to usb.

7. *MUST* Acquire vshmain.prx backup from the location on your flash0:
flash0:/vsh/module

Place this on your Desktop, and remember, this is your back up of the only file in danger.

8. From the Desktop, right click the decrypted vshmain.prx and select "Hex Edit with Hex Workshop v5.0"

9. Right click anywhere in the center box.

Photo

10. Make sure it's on Text String.

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11. Type in the value flash0 and click ok.

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12. Check all of the Results in the bottom right box...

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...until you come across the file-paths of the files you wish to relocate to flash1, flash2, or ms0.



13. Change flash0 in the right box...



...to flash1, flash2, or ms0.

14. Click "File" and "Save As" to get your modified vshmain.prx
MAKE SURE YOU MADE A BACKUP OF YOUR ORIGINAL vshmain.prx (step 7)

Put your modified vshmain.prx in:
flash0:/vsh/module/

15. Cut & Paste the files of the file-paths you changed to your Desktop and connect flash1, flash2, or ms0, whichever you selected, to usb.

16. Create the file structure in which the file you're moving originated (or to resemble the custom file path if you decided to make one) in the drive you chose to relocate the files to. Drop the files off of your Desktop into their corresponding folders.

17. Reboot your PSP. All should be well.

18. In the event something does not work:

A. Replace the modified vshmain.prx via Recovery Mode at flash0:/vsh/module/ with the backup vshmain.prx from your desktop.

B. Return the moved files to their original folders.

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if you meet every step of this guide, you will have 4-6, possibly 7mb free on your flash0 WITH 1.50 kernel subset installed.
on slims, the freespace numbers may get pretty big please report them if you try it.

Don't do anything stupid

Sterist

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