Not sure if it's okay to post it here or it breaks some kind of rule regarding posting untouched game contents (If so, feel free to delete this thread), anyway..
Here's a full pack of the original rooms textures. It might be useful to whoever wants to create their own HD mod or make a texture pack while keeping the original textures resolution. The 4-bit textures were re-arranged with the Dino Clasher tool. Enjoy!
https://drive.google.com/file/d/1DLqhZWOnAC9pfY0YN-JLNb0nlyI1QQA-/view?usp=sharing