yes man in each xbox game there are a .xbe file or default.xbe you must to extract it with xiso or xisomanager or others programs, dxbx can does it too..is very easy but to my is best
to extract all the iso in a folder..this way i don´t get any dirty problems,
note: the xbox emulators are very youngs in development need mores dev´s ...only there are like 6 games playables only..there are no way for to play other game only for the way of development and c++ writes..if you don´t are really a good advanced developer you can´t do that others games works ...