My trouble is that I want to run x264 using its own CLI, but cannot get it to find my installation of AviSynth. Everytime I try I get a"avs [error]: failed to load avisynth" error. I've tried re-installing AviSynth 2.5.8 (tried installing 2.6 alpha too) and hunting down any old remnant of it that could be lurking somewhere on the harddrive, but no luck. The same thing happens both for opening avs scripts and avi files. My OS is Vista 64 bit.
This is very frustrating, any ideas on what could be wrong?