Edit* All my research went towards which guide too use, lol
where did the link go? and why did i just download a youtube to video player lol
use imgburn (like Skell said)
go to mode choose WRITE
then where it says source - click on the icon and browse to the iso u have on your hard drive.
put your blank dvd in drive and click on the burn icon at the bottom
edit: and set your speed to 2x
Try the search.. lol