Installing Adrenaline on a PSTV is a total pain in the butt... I've had to reformat the system nearly every time to make it work. The installation process is easier now that it's a VPK and it fetches the custom firmware for you, but that didn't stop my PSTV from telling me that I needed to get rid of the previous installation, even after deleting that previous installation in at least two ways. Nuking the data from orbit was my only option.
After that, I installed the latest version of Adrenaline on my PSTV, went to VitaShell and plugged in my flash drive, and ran Adrenaline again. It needed to download the CFW and unpack all the files, but after that, it seemed to run fine. It was just an annoyance, and one of the reasons I don't use my PSTV much.