This is a tool which applies a mod to automatically skip all door animations in the game. It works by changing a small part of the game's code in memory related to what state a door animation is in.

You can download the tool here: https://github.com/FluffyQuack/rehd-nodoors/releases

You can apply the mod in 3 different ways (do one of these):

• Run the tool, and then run the game. The tool will wait for the game to start, and then automatically apply the mod.
  
• Run the game, and then run the tool. The tool will instantly apply the mod.
  
• Run the tool with the "-launchRE0" command line argument and it'll start RE0 HD Remaster for you, and then wait for the game to fully startup before applying the mod.

Once the mod has been applied, the tool will automatically stop after a few seconds. The tool also has support for skipping door animations in Resident Evil 1 HD Remaster. If it doesn't work, you can try right-clicking the tool and running it as administrator.

As an alternative way of applying the mod, you can use the trainer in Fluffy Manager: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=379140325