I came searching tonight for this same question and it seems I have also purchased from this same artist and am running into the same problem. I have been googling what these file extensions are and was trying to figure out how to create a texture map and no way can I get something loaded. I am also lost how to deal with this. I have a dress doing the exact same thing as Pagan Artist's bikini and would also like to figure out what to do because I have about 5 other purchases from the same artist and don't know what to do with them now.  The dress is called a "ppbinaryfile" and is in the prop folder but when you load it you have to conform it and then there is also  another file with the extension obz in the same file. So I will wait patiently to see if there is some answer to this as well or whether the extensions can be renamed and moved around or something. I am not experienced enough to do stuff" when it doesn't fit into my nice little easy learning pattern of pp2 or obj file etc.