This is a DS version or port if you want to call it that of retrobox (which is a(n) emulater(s)). To learn more about it go to the author's site.
http://www.geocities.com/retropoint/The defualt rom i am using is by matrixz. His site is here.
http://elazulspad.net/matrixz/You can read everything else in the instruction.txt, if you dont know what R does or how to use your own rom you didnt read enough.
I am happy to support anyone with answers to their questions after they read the instructions, Good luck getting RetroBoxDS and your game to work
No screen shots are provided since i dont have a cam and all emulaters can not draw it properly (although dulis gets close, someone please tell the author to implement divide).