Metal Gear Solid: Portable Ops Plus + NTSC (USA) version works. I tested it on JPCSP v0.6 2108 on operating system Windows 7 Ultimate. The greatest problem I have is that that the movies do not play and gameplay is slow. However, putting that aside this emulator is the most promising and well developed one out on the web so far. I changed many of the options and ran tests and it runs pretty much the same either way. I can run Metal Gear Solid 3: Snake Eater on full FPS on PCSX2, fyi, so imho I don't have a terrible computer. I'll update this post if I have any new info.
UPDATE: If Media Engine is enabled than more videos will work, but still not all.
What works:
-Sound (works great most of the time)
-Can get in-game and play (but it's terribly slow)
-Codecs
-Text
-Saving and loading
-Logos
What often doesn't work at all:
-Cutscenes/Movies [if media engine is disabled than even more don't work]
-Menus: some do not come up and you have to blindly go to things, or menu is intermittent...meaning it comes and goes randomly and it flickers or has "Fake MPEG video" come up and there is often flickering
What needs improvement and or tweaking:
-Sound (sometimes it doesn't play)
-Graphics (some graphics are outright missing/glitchy/and or have fragmentation)
-Speed (the game runs slow except for codecs and menu which are at normal fps)
-Text works but sometimes letters/words are missing
UPDATE: If Media Engine is enabled than more videos will work, but still not all.
What works:
-Sound (works great most of the time)
-Can get in-game and play (but it's terribly slow)
-Codecs
-Text
-Saving and loading
-Logos
What often doesn't work at all:
-Cutscenes/Movies [if media engine is disabled than even more don't work]
-Menus: some do not come up and you have to blindly go to things, or menu is intermittent...meaning it comes and goes randomly and it flickers or has "Fake MPEG video" come up and there is often flickering
What needs improvement and or tweaking:
-Sound (sometimes it doesn't play)
-Graphics (some graphics are outright missing/glitchy/and or have fragmentation)
-Speed (the game runs slow except for codecs and menu which are at normal fps)
-Text works but sometimes letters/words are missing