You can use this page to Trailrize your group.

Compile the form below with the code you want and the graphic you like, than click Trailrize button. After that you will obtain the code to paste in your group description. That's all it's needed.

You can customize the aspect of the result by proving the internet url of the images you want instead of the standard ones. Otherwise the default ones will be used. If you want to use your own graphics, please remember to credit the Trailr project in an equivalent way, such as placing before the code result a sentence like

"Comment and invite how it should be: in a click! Don't waste your time: use Trailr"

This is the equivalent code:
Comment and invite how it should be: in a click! Don't waste your time: use <a href="http://www.trailr.info">Trailr</a>

At "invide code" and "seen on code" textareas please insert the code right how you would edit it in flickr group description editor. I mean with all those "<" and ">"...