I have a file to large for a 700mb disc how can i reduce the size?

[dpaddict]

Is it in a ISO file, ie. .cdi, .nrg etc because sometimes the images will be larger than a cd can hold, however the way they are burnt sometimes saves the space required so they can be burnt. (im not sure of the technical stuff here.)

Your best bet is to try burning the file in simulation mode, if it gives you some errors then it might not work, but you might find it burns fine.