: The .iso inside the .rar is a disk image intended to be burned to a CD or mounted in a virtual machine (like VMware or VirtualBox) to bypass hardware boot limitations.
If you are looking for the "detailed paper" or technical manual, you can find the complete Official Plop Documentation here. It covers: Plop Boot Manager 5.0 - Download Download File plpbt.cd.iso_sigma4pc.com.rar
: Plpbt stands for Pl op B oot T echnology. It is a proprietary but free bootloader. Download File plpbt.cd.iso_sigma4pc.com.rar