How can I fit a 6 gig game "The Guy Game" onto a DVD-R?

I am trying to back up The Guy Game and it's almost 7 gigs, but I don't know what to do with the ISO to make it fit on a DVD-R. Any compression tools I can use? Any other possible methods would be appreciated too.

 

It's such a lame game, why not just leave it on the harddrive and just FTP when you want to transfer to a different xbox.

 

There's basically nothing you can do about it, unless you want to buy a DVD+DL and burn it.

 

I would have to ask since I gotted duped into buying it WHY would you waste a disk on that game.

 

Its all about the BOOBS.

 

Boobs, I guess thats as good as any reason. I bought it for the boobs but still boobs or no boobs the game is ok at best.

 

I heard it also has drinking games on it which is another reason I want to try it out. Also, does anyone know of any programs that will extract all the files out of an iso?