Alright so after I got it working, apparently emulated 2.71 by going back into Devhook, thinking that the way to go back to 2.71 from 1.50 was to tell Devhook. So Devhook got me back to 2.71 and all of a sudden I couldn't boot Devhook again! I thought this would be easy by just reloading HEN2 to repatch it since I know after a hard reset it'll erase or something so I do this and no avail.
Apparently sometimes you'll have to hard reset it at least five times.
It took me five times until HEN2 didnt turn off my PSP, but rebooted it.
So, if your homebrew being loaded from the XMB says , "The Game could not be started"
and HEN2 turns off your PSP rather than resetting it = means you gotta hard reset/run HEN2 more.
Hope that helped someone because I went into a small panic after losing my newly found 1.50 <3