Nice work on these, however your file structuring and naming is quite confusing. If I want to install both seasons, I have to rename the folders manually to avoid one pack overwriting the other if any cars share the same number across both seasons.
You can avoid this by adding the year to each skin folder name, and also in the ui_skin.json file to make it easier to identify for those downloading them. Same goes for your Audi A4 pack.
Looking forward to more though!
I reworking folder structure, and adding some missing skin, coming soon Mercedes C Class DTM 2004, Audi A4 DTM 2005 cars.