Yes they most certainly are.
I would recomend using Memorex or Verbatim or whatever it's called

LeeWan wrote are this the right kind of dual layerd dvd disc to make an iso

[ Register or Signin to view external links. ]

Yeah it is 8.5 *dual layer* i agree with -XboxGamer- memorex is better i think thats what i use

ok thanks alot its just i got the rong disc last time and i tried hotswaping and everytime it said disc unreaderble everytime the iso disc was in

are these ones ok

[ Register or Signin to view external links. ]

Get the aone gold edition discs they are AMAZING! U can install to hardrive and everything nd ther like 10 discs for 3 quid pretty cheap these are the ones I use I reccomend them A LOT! They are really hard to brake too cus I had my discs on my window cus I was jus admiring all the burnt modded iso discs I had :L and lookin at how many different mod menus I had. And 1 of them like I picked it up hit the side of my window with it by accident dropped it. It fell straight out of my window jus missing my mums car :L but ye it fell on bricks and nothing even hapened to the discs ther was a few scrathes on it that's all. Just sayin because with prevous discs I've had they've split in half in my hand when pickin them up good luck iso modding mate. I'd get motion flex v1 if I was you or pine tree v2

I want to make these aswell but would i have to open and modify my xbox?

You need to be able to hotswap OR have a flashed xbox that's what I use search it on youtube.

i use the aone gold edition and havent had any problems with them dude

[ Register or Signin to view external links. ] Here's the discs but its a 50 pack :/ if u look over the internet tho u should be able to find some 10 disc ones for bwt 2-6 quid