Personally I wanted to be able to position the icons relative to the content sides and keeping a minimum definable amount of distance from the page top and bottom.
If you don't mind it keeping a large space from the top of the page and only being definable x pixels from the left/right of the window edge, then this may still be for you.
Just install (via Joomla), insert an image (via Joomla) and resize to a smaller size (in the article editor via Joomla, just as you'd do now). In short, do *nothing* any differently than how you do it now... except you get beautiful slimbox displays of the images in your article - automatically.
I'm in love with this extension!
jFusion does an amazing job of this incredibly complex task with not much more than a little tweaking of the odd plugin settings page. Doing this without hacking core files of any app, *and* providing excellent support and a rapidly developing code base makes this the most exciting open source project I've seen since Joomla first emerged.
If ever there was a project that deserved praise, use and yes, financial contribution, kids, this is it.