Its been a while since Ive done anything with backing up 360 games. Things may be able to be done differently nowadays. But when I did it there were multiple steps involved in the process.
The first thing you had to do was to modify the disk drive of the Xbox. That process changes slightly depending on what type of drive you have. To do that check out the following links.
Once you figure out what type of drive you have go to YouTube and look for "Xbox 360 flash and whatever type of drive you have. Make sure to find a video that will guide you through the whole process or at least watch several videos so you have an idea of what you are supposed to be doing all the way through.
Again, when it comes to burning the games you might want to watch several videos just to make sure that you have a good understanding of everything thats involved. I dont really know exactly what is involved anymore because it has been so long since I have done that.
I dont think I was able to be that helpful. But, these are all the parts in the process so if you just use YouTube and ask more questions here you should be able to come to an understanding now that you know basically what is involved.
Once you had a modified Xbox you can then play the copied games. Again, check out the following links.
Try posting this on the Xbox 360 forums and you will have a better chance of getting your question answered.
1-plug toaster into power socket
2-turn power on
3-place disc in toaster
4-set timer to desired setting of 1-10
5-push leaver to start burn & wait for it to auto popup then your done
6-Add butter or margarine with desired flavored topping