[emu_nation]

I've been having some problems with IDeaS being too slow.
I've got:

Windows Vista Home Premium 32-bit system
Intel(R) Pentium(R) D CPU 3.40GHz
2047MB (2GB) RAM
NVidia GeForce 7600 GS card

My Emulator Settings:
DLDI: AceKard RPG SD
Exp. Ram: Supercard CF/SD
OpenGL Plugin: Everything enabled and Multisample 4x
---
Audio Resampling Quality: 44100Hz (Sterio)
Syncronize (best quality)

I hope it can be helped, at least slightly. If not please recommend the areas I should upgrade my computer, since I was thinking of upgrading it soon.

Also, the sound is abit choppy, what can I do to make it at least a little better? I've got the v1.0.0.5 audio plugin since i've heared it gives less problems than the new v1.0.0.9.
Which one and what settings do you recommend?

Thanks....