Total_Noob's PSP Emulator Custom Firmware for the Vita. CEF can be downloaded here.
Yes , I believe it is as simple as swapping out the ark savedata folder with the tnv folder. I remember seeing a post on the front page about it. Look for the announcement article for the mimana exploit.
[spoiler]Ps3 Phat 80gb 4.65 Ferrox, Ps3 Slim 120gb 4.65 Darknet, Ps3 Slim 320gb 4.66 OFW, Ps4 Destiny Bundle, Vita 1K OFW, Vita 1K TN-v, to many PSP's to list, Vita TV OFW, Collector of consoles[/spoiler]