I use Collectorz.com Movie Collector (pro) & it's great. I have tried a few others (can't remembver what ones), and this is the best I've found. It connects to IMDB, amoung others. http://www.collectorz.com/ Check out the free trial... if it sucks, don't buy it.
That's what the software I reccommended does. It downloads the plot, writer, runtime, etc from IMDB, along with a scan of the cover, & saves it to your computer. You should try it out. If you don't like it, it's a free trial, so you're not out anything.