Magic Iso Mac

Do you know any good programs to burn a 7.5 gig iso file on a disk of 4 GB?
I do not know if this makes sense, but instead of buying 10Gig drives me, I can just burn my Mac Leopard iso (7.5 g) on DVD 4gig? Do you know any programs? I do not know if Power ISO image ISO and Magic ISO have this capacity, please let me know. Thank you, you are a life saver!
If you only want to file a Disk storage * * You can compress the light of day living out of it. A program like 7Zip or WinRAR can compress it enough to burn a 4.7 GB disc If, however, you want a way to make a 7.5GB. iso bootable * * off a disc of 4.7 GB, no. This can not be done.
How to create a partition for your osx86 with Parted Magic (Shrink your current os)
