These mods were made a long time ago, and as DeSmuME is no longer that slow and broken (whereas Luigi__ became a developper), there's no point in continuing these mods...
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My computer specs:
OS: Vista Ultimate x86
CPU: Intel Core 2 Duo E6750 @2.66Ghz - 2GB of DDR2 RAM
GPU: NVIDIA GeForce 8800 GTS 512
My recommended settings for iDeaS:
DirectSound 1.0.1.4 beta: 22050 Hz - Stereo - Synchronize - buffer of 7 seconds
OpenGL 3D: disable Shaders and Fog (maybe Software Lights) unless stated otherwise.