This is working great.
Just one comment:
I have a lot of directories loaded with large files. MPQ seems to have some performance issues with it, if it's simple to fix, that would be nice. If it's too much, no big deal. Loading the configuration screen and exiting, and also the launching of the screensaver can take a while. On my computer, it was about 10-20 seconds for each of those things. And it's a pretty beefy computer: 12GB ram, i7.