Make Xbox 360 Backup Step by Step

I have 4 entire days trying to make an Call of duty 4 backup from an original. so i surf all the forums related to this subject and nothing.
so this is what i do....

Items
Dvd +Rw D/L LG
Imation +R D/L media
Wx Ripper 1.2
Imgburn 2.4


Steps
1. i open my LG Dvd Burner and make the swap to do the ISO

Result: Everything go OK, i made the iso

2. Open Imgburn, apply al the config stuff and burn the ISO

Result: Everything go OK, i burn the iso

3. Go to my Modded Xbox 360 put the disc in....

Result: Screen with "Insert this disc in a Xbox360 Console"

So, keep searching and somebody tell me i have to patch the iso file.
Thats where i'm stuck.

So, somebody can make a tutorial tell me all the steps from the begining to the end (including patching the iso, and where to obtain the SS, pif and other files)to make a 100% working backup of an xbox 360 game

please don't send me to incomplete tutorials, Thanks in advance to the help what im sure is not only to my self.

 

i dont think you flashed your 360 properly. Its really not difficult to do...Any of this. So go and try your luck again with flashing.