Here's a link to the differences between the cinema- and unrated version of the remake of "Last House on the Left"- sadly in German, but with pictured shot comparisons of the alternate scenes.
I STRONLY suggest only those, who've seen the movie already, to take a look, as the list of cuts contains obviously spoilers:
http://www.schnittberichte.com/schni...php?ID=4659443
(SPOILER ON: The biggest changes are to the rape scene whereas the "revenge" part has been left untouched by the MPAA in the theatrical version. SPOILER OFF)