as for priibooter_gui as installed file. you mean the boot.dol that is in the priibootergui folder?
Yes, priibootergui. It is really intended to be installed in priiloader. It has no other use
postLoader 3.71.6
* Is no more required that the FAT32 partition dedicated to wii homebrew is the first one.
* Removed "Set default loader..." when running under neek
* DML: added support for fst format (GCReEx) [untested]. Can be very slow on rebuilding cache, with fst games.
* Corrected a bug on detecting "ID6_Gamename" format