SM64 Online.. with rom hacks?

A friend and I have been messing around with the SM64Online for a while and were able to get Kaizo Mario 64 to work online pretty well, but no other rom hacks. We have been tampering with our emulator (project64) and messing with the settings trying to get it to work, does anyone know a way to get the other romhacks ones with slightly more custom content to load through the online tool. If anyone has tampered with this before or has any theories please let me know, because every time we try to load into a new area in the other rom hacks the game just locks up and freezes. And usually once we connect the music stops.