http://buildbot.orphis.net/pcsx2/index.php newest version of pcsx2 can be found here and its updated often.

digimon world 4...it should run with no major problems aside from sluggish frame rates but thats a given with ps2 games in general.

yeah, should run fine aside from the frame rate (which can affect the audio frame rate as well i don't remember how that might be fixable).

newest version of the emulator, plugins can pretty much all be left as they appear by default:

http://imgur.com/pVizIOG you may or may not have to adjust something in the video plugin settings but this game should work good enough. as for the BIOS files you'd need, i don't even remember where i got mine. but once you download the game, unzip (and unECM if needed) then click CDVD > Browse and choose where you unzipped the ISO then click system > boot CDVD (fast or full, doesn't really matter which) and it should start up and work fine.

oh, right, http://wiki.pcsx2.net/index.php/Digimon_World_4