If you want it for Xenia-Canary here's all you need
https://mega.nz/file/KhY3XTYJ#L9Mb9_KtITkYoJplBJFzKoVaSrxClvWu4zOB9Vd7kMU
Update and DLC folders go into emu content folder, you know the drill.
I have made an ahk for vita3k years ago that still works
The run command is : primaryExe.Run(" -r " . TitleID)
So I believe your .bat should be like :
"D:\Arcade\Sony Playstation Vita\Vita3K.exe" --fullscreen -r PCSE01389