This is for those who watch movies on their computer's dvd rom drive!!! There is a software called dvd idle pro which can really increase the life of your dvd drive. By using the Smart Read-ahead Cache, DVDIdle saves DVD data which will be played soon onto the hard disk cache or RAM cache, and then feeds it to DVD player. This allows the DVD drive to rest. For example: a 6X-speed DVD drive will only work for 15 minutes when you are watching a 90 minutes DVD movie.
here is the link: http://www.dvdidle.com/download/DVDIdlePro59.exe