You can use internalVar to get various directories and then modify it as needed or have some sort of settings file that is updated by the script and set by the user.
I added a Speed Control effect modifier, and I synched the audio and the video strips, and that seemed to have done the trick. Now the video is rendering.
Do Modo deformers allow a non-destructive modeling? What kind of non-destructive stacked modifiers does Modo support and will this be improved in the future?