1) Download the EML tool if you haven’t already
http://www.customprotocol.com/undergrou ... mory-card/
Download and extract the archive above in a defined space on your computer (on the desktop for instance). Then find “MailWriter\MailWriter\bin\Release\MailWriter.exe” software and execute it. A window should appear.
Only 2 fields have to be filled in :
File : the file which will replace the target file on the memory card
Path : the path to the target file. Note : the directory to the “PSP Emu” part can be found in “ux0:pspemu/” (=”ms0”)
Generate : click on the button to generate the wanted EML file
4) Once the .eml file is generated you will need to send it to yourself via either Thunderbird or Outlook Express.
5) On your Vita open up the email app and view the e-mail you just send yourself.
6) Click on the attachment but do NOT push OK on the appearing Error Message!!!
eml_error
7) Just close the e-mail app immediately and remove the memory card..
You should now be able to put this memory card into any other Vita without the need to format! But remember that you will need to redo this process every time you want to swap again!