Hi and welcome...to pspmod...So...your at 3.72? Only way you can play downloaded and homebrew games is if you downgrade. I suggest 3.52 M33-4 as its currently the best (or so i think) Only way you can downgrade is pandoras battery. Find someone with custom firmware and get them to help you downgrade. Or if you cant then go to
Dark Messiah and find someone near you who will do it.