Nero has a trial version that is free for 30 days , however, after that you have to buy it or it will stop functioning. nero version 8 will not work with DVD Shrink. nero 6 and 7 can probably found at afordable prices now that version 8 is out. You can find different versions of nero that you might want to try here: http://www.filehippo.com/search?q=nero+7 or http://www.soft32.com/download_125465.html
As stated, Nero is available FREE for a TRIAL period after that you have to purchase it....Nero 8 is NOT a good version to use with DVD Shrink. http://forums.afterdawn.com/thread_view.cfm/579894