CrimixOfficial/rivals-custom-sky — reverse-engineered prompt

Build me a simple Windows auto installer for custom Roblox skies that works with Fishstrap. I want it to be easy for someone who doesn’t know much about files, they should be able to pick a sky pack and install it with one click or a simple menu.

It should look for Fishstrap in the normal local app data folder, find the latest Roblox version, go to the sky texture folder, remove the old sky files, and copy in the 6 new sky512 tex files from the selected sky folder. It should support multiple sky folders sitting next to the installer, so users can switch between different skies quickly.

Please include clear first time setup instructions, simple error messages like Fishstrap not found or missing tex files, and notes about running as admin if needed. Also make it easy for people to add their own sky folder later, as long as it has the 6 required sky files.