Combine iso's? quick question

ok i have multiple isos’s i want to combine to fit on a dvd r-… can i do it? its the snes emulator for the xbox… theres 7 different isos at only 650mb a piece… my xbox doest read cdr’s so i need to put them on dvdr’s… i already put them on multiple dvd rw’s, but now want to fit them all on one…
thanks for any help…