I never played that iso (I downloaded a lot of isos months ago but I didn't check them)
The emu I use for isos is HU-GO!
UPDATED: Well, I've tried Nectaris with HU-GO! and the game itself works fine (there's some glitches in the cutscenes)
Remember to start the emu with HU-GO!.EXE -c2
I hope it works for you