I want to run the LateLatch program with original HMD

Now I’m trying to run the latelatch_dx program using the original HMD, but I do not know what to do to display the image on the HMD display.
For example, if you have a direct_mode_dx program, you can display by setting EDID etc of HMD, but please let me know what kind of things are necessary in latelatch_dx.