Thanks to work done almost entirely by Netrix (and also thanks to SMOKE for testing and modifications to the setup script), Rejuvenate is now supported on both PSM Unity and PSM Unity for VitaTV.
Just like before, run SETUP.bat and follow the directions. If you are using PSM+, be sure to follow the directions where you get PSM+. To use on VitaTV, install the client on your Vita and then move the memory card to the VitaTV. I hear that mr.gas will release a method for client installation that does not require a Vita to install. Follow him on Twitter for details on that when the time comes.
Support will be provided in #vitadev on EFNet IRC. Netrix, who is responsible for the Unity port will be on there.
Enjoy and happy homebrewing!