My method was inspired by this guide on loading Half Life 2: Update in HL2VR. https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2865510273
I also posted a YT video where I demonstrate the mod loading. (Spoilers)
https://youtu.be/iCkKbJkycqU?
Again, music and the dialogue that appears on screen do not work. That's going to require someone with much more talent than me to fix.

YOU NEED TO LAUNCH EPISODE 1 VR FOR THIS TO WORK

• Take all interior folders from minerva (maps, materials, sound)
  
• Place in Episodic folder and overwrite everything except for the config.cfg.
  
• Don't know if overwriting config.cfg breaks anything but I didn't want to find out.
  
• Then load whatever map you want from the console at the title screen. I would do metastasis_1 to play from the start, but I have not tested to see if the cutscene is broken

YOU NEED TO LAUNCH EPISODE 1 VR FOR THIS TO WORK