It’s really simple. Just start the game and skip all of the cutscenes. Hold down shift while quickly pressing comma twice. This should bring you to the Humungous Entertainment logo and back. The glitch should now be working.

From there you can just set up the run using room 27 and save. Information on how to do this can be found here: https://www.speedrun.com/spyfox1/guide/3f4dq