I installed PLOP without any trouble.
Instructions for XP on the site.
I had to figure it out for Vista/7. Only took a few minutes.
Instructions are right on the site:
Harddisk install using the Windows boot menu (2K, XP and VISTA)
Download the file plpgenbtldr-0.7.zip and extract it. http://download.plop.at/files/bootmn...nbtldr-0.7.zip
Create a directory like c:\plop. You can use any directory you want.
Copy plpinstc.com and plpgenbtldr.exe to your c:\plop directory
Rename plpinstc.com to plpbt.bin.
As administrator/with administrator rights open a command shell and change to c:\plop
Then start plpgenbtldr
This program searches for the file plpbt.bin In the current directory.
plpgenbtldr generates the file plpbtldr.bin.
Adding to the boot menu. Windows 2K and XP :
add the line below to your c:\boot.ini
c:\plop\plpbtldr.bin="Install PLoP Boot Manager"
For Vista/7 add it to bcd the same as you would add ntldr.