How can I backup a movie without one or two chapters?

I want to reduce the size of a dvd-9 to put it to a dvd-5 by removing one or two chapters from it, I mean, I want to backup the whole movie except for one or two chapters. Can I do it with DCD Shrink? How? If not what program do I need?

DVD Decrypter using IFO Mode. Just untick the chapters not required.

And then can I burn the ripped files on a dvd? Do I have to edit the *.IFO file or do something else?