Fitting 5.3gB on one DVD

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I've ripped a film (video and one sound option) but the size of it is still 5.3gB which obviously won't fit on one standard DVD.

I've seen a program called FukNCalcdvd which apprently can resample it and shrink to fit a DVD, however this program won't work on Windows XP or at least on my computer.

Does anyone know a way of resizing this film to shrink the AC3 and M2V file so that it fits on a DVD?

Is it worth tryng to rip it again with a lesser sound quality?