It does not appear that ppp files are the kind that would require a media player. Or are you asking about something different?
Does this thread relate to your problem?
After a little more googling It seems there are half a dozen different progs that use ppp file extensions including the one used by JVC video cameras.
What software are you using to create the files in the first place so we know what you're talking about?
Goin' Fishin' (Some day)