Any way to add custom pictures to video files?

I’ve made a little app where you can modify or create movie info and you can also use it to add or replace video cover using an image from a file or browser, it will automatically resize an image to best fit and save it as a movie cover!

This app was especially designed for those videos you won’t find on internet movie databases!

You can find it here:

http://community.wdc.com/t5/General-Discussions/WDTV-Live-Hub-XML-Editor-Version-1-0-0-0-Released/m-p/176892