Mhhh here's another problem, your texture are in A8R8G8B8
without mip maping wich is a call for FPS loss, it's also due to
this that your archive is so big.
You must save them in DXT1 with mip maping.
You have a tool for that Dxtex.exe in Orbiter/utils
use change format then "generate mip map"
I'll delete the upload, please change format and upload them again.
tips: prepare description and text before and don't hurry, use preview,
it take two seconds to control if the title is right.
tips: why two level of directory ? one is enough "caduceus" not "my addon/caduceus"
Thanks
Dan