Can GimageX be used to backup and restore an NT server OS?
According to the inforamtion on the official website, the software is compatible with Windows XP or higher. I checked the page, but there was nothing mentioned about Windows NT or something related which means it might not be supported on this operating system. The software is designed to work with modern operating systems, but you can give it a try using the link posted below.
Official website: https://www.autoitscript.com/site/autoit-tools/gimagex/