Help me install a Hell in a Cell arena in Fire Pro Wrestling World on Windows PC. Read https://wrestling.rocks/hiac/ first. The goal is the arena and normal match setup, not a playable roof-collapse mode. Start with a read-only inventory. Locate my real Steam game folder and active save/profile; do not assume a drive letter or username. Record game and installed mod versions, existing patch selections, wrestler/ring counts, and the supplied archive filenames. I will obtain ModPack, PWGR Patcher and the arena files through the creators' release channels. Do not invent download links or bypass access requirements. Close the game before installation. Make a dated backup outside the game folder of the active saves, ModPackData, modified asset folders, patcher configuration and Managed assemblies. Verify the backup exists. Extract every volume of each archive to a separate staging folder first; report missing volumes and conflicting files before overwriting anything. Use the release's installation instructions and compatible mod versions. Preserve existing mod selections. For the supplied WWE HIAC pack, check Arena Edit versus ArenaEdit, normalize AR00_ arena images into RingMats/ArenaMats/AR00/ as described in the guide, and use a CSV parser to repair texture fields to my actual paths. Preserve CSV columns, quoting and all non-path values. Check every texture reference resolves. Do not rename unrelated assets. Create or match the exact custom ring names WWE HELL IN A CELL and WWE HELL IN A CELL (CAGE), associate their Arena Texture Database entries and select Big Garden Arena (AR00). Do not replace my save or MatData.dat with someone else's. If the installed UI or API differs, inspect it or ask for a screenshot rather than guessing. Do not install the private HiacDirectorHost or staging payloads. Validate a loaded match visually, confirm the intended cage geometry and textures, return to the menu, restart the game and confirm persistence. Compare wrestler/ring counts to the baseline and report exactly what changed, what was tested, what remains unverified, and how to restore the backup. An existing file or successful patch log alone is not proof of a working arena.