All right - I took the time and added some input to the code.
I don't want this to be distributed any further, since it is not really ready for release.
It scans recursively for images (.jpg, .png, .bmp). If your cover images have special names you can give them as parameters (eg. "chronflow.exe folder.jpg" will only display images named "folder.jpg").
This is not really ready for release, but I wanted to show you the cool spiral flow (which I really enjoy playing with ^^). If I release this as a foobar plugin, style of cover flow will be completely costumizable via formatting strings, so the spiral is only an example.
The default.png is the image that is shown for not yet loaded covers. If you have anything better for this (I just took my albumimg-panel no-cover image), feel free to post it since I will need this for a release.
Controls are: left arrow/right arrow, pg up/down, mouse wheel and clicking on covers.
You can only scroll through the images - it doesn't start an application do anything else.
This is only an alpha version, but if you find
any bugs, feel free to report them - maybe I don't know it already

.