: 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.
: In your VM settings (e.g., VMware Player), attach the plpbt.iso to the virtual CD/DVD drive. Start the VM, and use the Plop interface to force a boot from a physical USB device connected to your host. Detailed Documentation
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