PSVIMGTools release, and today PS Vita developer @SilicaAndPina passed along word on Twitter of a Hidden Applications 3.63 homebrew app that includes a Package Installer (for Interface Demonstration Unit PS Vita IDU consoles) and the ability to Sign Up for PSN which enables Account Switching with details below.
Download: CreateBackup.zip (1.9 MB) / bootimage_extract-master.zip / GIT / PSVIMGTools Frontend / out.zip (PSTV Full Dump - 169.85 MB)
Here is what SilicaAndPina has to say on this homebrew app: Hello! I have had this for awhile but only releasing this now since we have VitaIMGTools which gives us an easy way to install this.
This is a 'homebrew' for 3.63 if you will that allows you to launch the 2 applications that sony has hidden - Package installer (however it doesnt run on non-idu vita's) and - Sign Up For PSN (Enables Account Switching!)
I've made this as easy as i possibly can to install just read the readme.txt inside the .zip file, but if you want a tutorial here:
0.1 Download ★Hidden Applications CreateBackup.zip
1. Download VitaIMGTools for your OS
2. Obtain your CMA Key From: http://cma.henkaku.xyz
just enter your AID (the random letters and numbers where your CMA backups are stored) and it will give you the key.
3. Put the PSVIMGTools in the same place as the readme.txt from CreateBackup.zip
4. Run the BuildScript for your OS.
5. Paste/Enter your CMA Key and press enter
6. Copy the "HIDENAPPS" folder into your CMA Backups/APP Folder
7. Refresh CMA Database, and restore backup to your vita
If your wondering how this works its because it doesn't actually need to launch its own eboot its just a gdb category param.sfo and some uri's on livearea.xml
Finally, following version 1 today HackInformer posted a guide on how to install the PSTV whitelist patch (v2) for those interested!