WordPress.org

I installed everything, but I don't see any images. What am I doing wrong?

Check if you have uploaded reflect2/3.php to your WordPress root folder (the directory where your wp-config.php file is in).

My images don't seem to get cached?

For the caching to work you have to use the NGG default paths, as NextGEN ImageFlow uses the same cache folder as NGG. So that would be wp-content/gallery/cache.

But I changed that path. What can I do?

Open reflect2/3.php, go down to around line 80 and adjust this line $cache_dir = dirname(FILE).'/wp-content/gallery/cache';

Anything else I should know?

Well, now you can use a reflection with any image on your blog that is not part of your NextGEN Gallery. Instead of referencing the URL of your image you can now write something like this: src="path/to/WP-root-folder/reflect2.php?img=relative/path/to/image.jpg&bgc=ffffff".