Resolving the generation of WINDOWS.OLD folder during Vista installation

In the past, when we installed Windows XP/Server 2003, after the installer detected the \\WINDOWS folder, it will ask "\\WINDOWS folder already exists, whether to specify other Folder", we can specify a new installation folder here. However, this method does not work for Windows Vista. After the Windows Vista installer detects the \\WINDOWS folder, it renames it to \\WINDOWS.OLD and insists on installing it in \\WINDOWS. The reason is that Windows Vista is a mirror-based installation, so we can't set the Windows folder during the installation process, which means we can't install Windows Vista in other folders to achieve the desire to install two operating systems in one partition. .