Select the automatic backup option with the "Auto" tab and Dvd-Replica does all the work for you. If the size of the main movie title is smaller than 4.38 GB, it is placed on the first disc. The remaining titles are put on the second disc if they do not fit on the first disc. If the main movie title is too large to fit a DVD-R disc, it will be split automatically.

You can change the playback flow of the original DVD by choosing to begin the playback with a specific title or with the movie menu. If you are interested in only the contents of the first or second disc, choose the option "Skip disc" to skip the appropriate disc, so that the time and required storage space to back up are significantly reduced.

DVD-Replica v2.4 User's Guide