This is a Snow Leopard service menu item that converts RipIt (http://thelittleappfactory.com/ripit/) rips to ISO format. RipIt rips DVDs to VIDEO_TS/VOB format but it is often useful to have the ripped DVD in ISO format instead. This service allows you to right click a DVD ripped to VIDEO_TS/VOB/dvdmedia and convert it to ISO.
Be warned that the resulting ISO won’t work in all DVD players.
To use, download the file linked below and move it to your Library/Services directory.