Very first post 3!

I've recently bought a Wiikey (still not delivered yet actually) in order to play a back-up version of Dairantou Smash Brothers X. That game is pretty big, I think it's about 8GB.

Sooo... Now I have to find a DVD, compatible with the Wii, with a capacity of more than 8GB. The only ones I know are Double Layers (which I think the Wii can't read) and HD DVD-R (I don't think it can read those either).

Any ideas? What kind of DVD do you usually use for your back-up games? Any kind of help is appreciated, thanks in advance.