You can burn the game, you will need a DVD+R DL disc preferable a Verbatim one. When burning you should make sure that the burner sets the booktype to DVD-Rom plus you will need to make sure your mod chip can boot DL backups. Older(i mean real old) chips can't boot DL discs, newer ones can but the game needs to be patched with the toxic patcher first but some of the latest chip don't need the game patched as the chip has an option to do it on the fly.
If your using swap magic then burning to a DL is not an option as swap magic can't boot DL discs if I recall.
If however you don't want to burn it to a DL the are ripping guides/kits about that will rip out the extras that are on the disc so all you have is the game and that will fit on a standard DVD-R