100% yes!! The original DEOT v1+ 0.4 has a plethora of links showing how each thing has been applied. I actually strongly recommend and encourage people to build things themselves. I didn’t provide the same links in the DEOT v2+ 0.5 OP since they’re basically identical. Although that reminds me! I should put the Picodrive reference up!
As for the mupen64plus config, installation script, action file and dependencies, they can be found on the same google drive link I post the images on. Here’s a direct link.
https://drive.google.com/drive/folders/1gdp6lrHK1bmBTM_CKiU7RNXKL-W8w0X3
The rest of the bits and bobs I did can be found in a whole heap of other directories.
https://drive.google.com/drive/folders/1FuilALZ8VWKmpAMgaVzW-5kd6f-pwJK3
That’s most of them. You’ll need to go through the notes in the OP of the two DEOT image threads to understand where to put most of the files. Or just ask me in the relevant thread. 
Basically, I got sick of all of the negative posts slamming the devs, asking for things to be done for people, that I decided to try and solve as many problems as possible in a positive light. I just want to keep things happy and moving. Negativity just makes people disinclined to do anything.