You need to compress the movie with something like DVDShrink or CloneDVD2. Lots of information at this sight about putting DVD9 onto DVD5's by compression.
R718, Welcome to the forum. Below is a guide that uses only freeware. Follow it and you will have no problems http://home.comcast.net/~bbmayo/backup with DVDFABDecrypter,Shrink,&Decrypter.pdf
The time frame in which the movie is has no bearing on if it will fit on a disc or not. What you are worried about, is the "final" size of the DVD.