Right here's what ya do,
Get the Files - RAR`s they may be split .. might even be Bin and Cue files in there i would assume so as they have been split, if so open the first RAR And extract the bin and cue file to one folder it will then in turn take the rest of the files in the RAR's u have a "Image" then u need a program like..... Alcohol 120% which can mount the "image" file onto a virtual drive as one movie, where u can watch or move into DVD-r.
its a quick process when u get the hang of it.
if ur RAR's dont have the .bin & .cue or .iso (or a image type) files then u need a Movie Joiner of some type.
Hope this Helps..