This is the same thing as my dvdsplit for linux program, with a GUI interface. This program will take a list of directories and break up all the files in those directories into 4.5gig chunks so that they can easily be burned to DVD.
Split a large filesystem into groups of files of less than 4.5 gig so they can be burned to a DVD. No archiving, no compression, it makes hard links to the original files so you can easily delete the tree structure after you've burned them to DVD.