I have a vita with 3.55 firmware with TNV installed right now. I want to update to the latest software to see trophies and play online but want to keep the psp games. I heard that TNV can not be deleted if I update, is it true? Also I keep hearing that VHBL will work on latest firmware but it does not play psp games, is that true? Is it worth updating to play online and use trophies?