ITunes :: Change The Name Of The Videos?

I have been loading my DVD collection onto my Time Capsule HD and watching them streaming through my ATV. However, I was going to try to organize the files better and rename the titles so the movie title came up as more recognizable then how it gets written into iTunes. When I try to rename the title by right clicking the movie then left clicking "get info", I type in the movie name that I want and I then get the dreaded rainbow wheel. I right click my iTunes on the dock and its saying 'application not responding" so I go ahead and "force quit". Of course, when I do this nothing is saved because it has not finished with the 'OK". I tried going to rename them on the TC and then the movies would not play any more. When I have waited for iTunes to finish and ok the name change I could no longer see the film that way either. It would come up with the player and would show the counter like it really is playing but no video or audio.  

I really want to put the real names on the movies with what they are, its a little annoying to look at, for instance...the movie American Pie is titled "AMPIEDC_2_Title_1...The movie America's Sweethearts is titled DVD_VIDEO_Title_1.  

This is what shows up in iTunes and subsequently on my ATV or home sharing anything which is quite annoying and unless you know that is how the DVD loaded itself you would not really know what the title of the movie is.  

Info:
Mac mini, Mac OS X (10.7.3), 8 GB memory 500 GB HD