If you're using the PropertiesPlus script that I uploaded it should create and install into the subfolder System32\ShellExt the folowing files: ppshlext.dll, ppshlext.exe and ppshlext.txt. The only other thing it does is to register the DLL as an approved extension.
I got winload error upon booting, I looked at it was not present in system32 folder.
I'm using the same script myself and it seems to work okay. It certainly should not have any effect whatever on your boot loader.