burn an iso to DVD +- R for gameplay on xbox 360??

I have killtrocity mappack and i want to know how to burn it to a DVD + or - R so i can play it on my xbox 360. I dont want to mess up my warrenty.... so please help....

 

do you have a mod chip??

 

its currently impossible to play modded mappacks on a xbox 360.

 

unless you have your firmware flashed or a chip your 360 will not read it....

 

what about this??? http://forums.afterdawn.com/thread_view.cfm/359114

could you still do that on an unmodded xbox 360??? also... what format does the mappack have to be in when u write it to the DVD+R DL??? iso?