not sure if this was posted before, but i stumbled apon this by accident. Im currently using windows vista home to store my videos that i rip (legally! hahaha). I was able to have the box covers show up in boxee when im looking through in sources.
If you want to learn how to hook up a windows source, i made a guide -- serach this forum for windows source.
1. download the boxcover of a movie you have ripped. the best source for this imho is amazon. i go to amazon, type in the name of the dvd and just drop and drag the picture or boxcover they use into the folder of my video. so most videos are like <folder name> and inside the folder it has a video and audio ts folder. i place the graphic in there and call it boxcover.jpg.
2. once i have the boxcover in the directory, i right click on the folder and go to properties.
3. click on customize tab
4. look for folder image and click on 'choose a file'
** make sure that Also apply this template to all subfolders it NOT checked. unless you really want to :P
5. find the boxcover.jpg file you created in step 1 and choose it.
** on my machine the folder image did not refresh and i had to refresh by using disk cleanup utility and deleted "thumbnails" it took some time and then it showed up in vista.
Thats all you need to do, now when you go back into boxee and go to sources, when you move over the folder the box image will appear to the right.
anyone want to test this in xp or macox?