well for a starter what bios did you download and where from? (just so i can confirm that it is the correct bios)
secondly i didnt think PCSX needed plugins?
either way if you want to get plugins download
this starter pack and just copy and paste the plugins folder into your emulator folder you wont be able to use this emulator since it was designed for windows, but you should still be able to use the plugins from it if not report back and ill do some searching for you
for the games you can find them all
here