[raina343]

however it does appear that there are some issues when it comes to loading some types of roms.
some rom images have a .bin file extension (seen with some Genesis/MD roms and PSX roms).  if you try launching these directly it isn't launching these via retroplayer, but rather in VideoPlayer.. which in turn causes the screen to just flash for a second, and it was my initial incorrect assumption that this screen flash was due to this missing 'addon'.

The solution to this is rather hidden, but you can find it at the end of this post.

The solution is to not depend on the extension, and inspect the file. I actually started a python library to do this: PyRomInfo

This feature is on the roadmap, but it needs some more work before it's ready. Volunteers are welcome! 

 modifying the Advancedsettings.xml worked like a charm.  thank you for that info.