How to install in Penumbra:
- Click the plus sign to add a new mod
- Click Edit Mod, then Open Mod Directory
- In the folder that opens, create a folder named: chara
- In the chara folder, paste the file "midlander_dTATTOO.tex"
- In Penumbra, click Advanced Editing
- If you don't see "chara\midlander_dTATTOO.tex", click Reload Files
- In "Add New Path", paste: chara/bibo/midlander_d.tex
- Click Apply Changes

Credit:
I learned these steps from https://reniguide.info/ which is a great resource for learning Penumbra!