By using the mail writer tricks or HENkaku you can dump, edit and write back your Registry and basically edit whatever you want from region swapping to button assignment!
Friendly reminder: Do NOT share your registry files with anyone, as they contain your PSN login data in plain text.
Editing at your own risk!!
Tutorials & Guides Compilation
[Tutorial] How to fake the Vita's Region
[Tutorial] How to swap the X/O button assignment
[Tutorial] How to activate Semi-Debug Mode
[Tutorial] How to read out YOUR PSN login data
Frequently Asked Questions
Can I get banned for doing this?!
We don't know how sony is going to deal with this yet. So its at your own risk.
My e-mail shows a [?] instead of the photo symbol?!
Try resetting the Vita's mail account or resend the mail.