This will help me find the exact installation steps for you.
: Use a utility like WinRAR , 7-Zip , or The Unarchiver to open the archive. Right-click the file and select "Extract Here" or "Extract to SPECIAL990_PACK2/". SPECIAL990_PACK2.rar
Since specific documentation for this exact filename is not publicly indexed, you can generally access and use the contents by following these steps: This will help me find the exact installation steps for you
: Usually require moving files into a "Mods" or "Data" folder within the game's directory. SPECIAL990_PACK2.rar
: May contain an .exe installer or a .bin file meant to be loaded onto a device via USB.