I already feel dumb for asking.. Just help me please

I have 5.50 Prometheus and I installed the PSNLove plugin today.. I registered for the first time on PSN as a Jap member.. I notice an error pops up when I click on certain links but I usually still get to the page I want... Anyways, I downloaded a couple freebies. And I get a simple error "The Game cannot be Started."

Now I've seen someone on here posting patched Jap demos.. So i suppose they need some mod before they can be played.. Or am I missing something? I must be, cause I figured why be able to access PSN without being able to play the downloads...