burning dmg to disk (MAC)

So recently I received a dmg with snow leopard on it, the only problem is when I go to disk utility to burn the dmg to the disk it has the superdrive set as the burn location. Then when I go to 'file' and manually burn it to the disk, It burns the dmg itself. (-----In other words after it finished burning the dmg onto the disk, I reinserted the disk. Only to see that the disk had the snow leopard dmg on it but not the files from the dmg. Because when I mount the dmg from the disk it isn't any different then mounting it from the computer.-----) Does anyone know how I can put the files from the dmg onto the disk, while still being able to activate the snow leopard installer (from the disk)?