if your ok losing all of your windows data, just delete everything that gparted found.
well you should see some boxes that represent different parts of your drive, just right click on each one and select delete. then go to the top of the program that say 'start' or something like that to complete the actions.
the one i always use has a mouse cursor, i dont know what you downloaded lol
you cant delete a disc unless its a rewriteable cd.
lol. Guess I got to burn another one!
Edit: Im downloading G-parted Live 0.3.9-13.iso Right? I think that's Right?