Napierski is an episcopus vagante claiming episcopal orders from the Thuc lineage. Archbishop Ngô-dinh-Thuc in the last years of his life suffered from dementia and ordained and subsequently consecrated a number of bishops who took it upon themselves to erect any number of vagante ecclesiae which further flooded the so-called 'Independent Catholic and Orthodox Church' ranks. Like many of his genre, Napierski likewise claims sub conditione episcopal orders from a variety of other equally dubious lines - with Catholic, EO, EC, OO, and OC origins, if I remember correctly, as well as an Old Catholic or two. His personal 'Church', as already noted, is termed 'Corpus Dei'.
Like many of his ilk, the good bishop would appear to be the sole cleric and perhaps the entire congregation of his "Church". He's also a tad more 'out-there' than even most of them. As you'll see in reading his site, he goes to great lengths to make it appear that he's in communion with Rome and these folks generally are very adept at getting photo-ops, etc, that seem to make them appear legitimate. Unfortunately, one can find photos of any number of them with Popes, the EP, the MP, the Coptic Pope, and various other hierarchs. Had this character tried to pull this off with a bit more attention to his clerical garb or on a less unique occasion, you'd have probably seen him con-celebrating at the high altar of St Peter's.
posted from my laz-y-boy cathedra in my garage cum cathedral in this the 45th year of my reign as patriarch-archeparch of Slobbovia and the 450th of the Baptism of Slobbovia