OK, these day, you dont have any reason to use pirated software, use freeware or open source software... Even 3DGS has free version right now...
Erics Castro said that he convert them from X files, maybe if he could post where he got those, it will be clear I guess... The intention is good I guess, so people dont have to bother searching the internet for free models but at least you can put credits of their maker...