Since some people are under the impression that DVDCopy 4 is without speed control for burning and has no re-authoring abilities, I thought I'd add this little post. The software contains a good help section.
DVDCopy 4 does have a speed control feature, it's located in Main Menu (top right menu), Tools, Disc Tool, click More (to open Write Options/Actions). It appears to limit the source to the optical drives, virtual drives, and images on the hard drive (ISO, Nero and such). I don't see an option for files from the hard drive. Plus for doing the backup there are Full Disc, Movie Only, and Custom as options. In Custom you choose what you want. Plus there are the options for different output formats (DVD, VCD, SVCD, WMV, DivX, DivX (AVI), Audio CD, MP3, and WMA) and different DVD selections in those (1 DVD5 (Fit to One Disc), DVD9, or split to different discs with no compression (uncheck "Fit to One Disc" selection)). Re-authoring? =====================================================================