I was surprised that HTML code really works in quack comments. I guess @iMultipers keep this secret on his own so no one knows. LOL.
I did this very basic HTML code:
Copy and paste this HTML code to insert images in quacks/comments:
<img src="http://www.SITENAME.pngor .gif" width="500" height="350">
Change the URL, and change the width and height for resizing them. 500 (width), and 350 (height) are fit in quack box. We can change to be 200x100 for banner, or 36x36 for icon, and 24x24 for smileys.
Some codes like <p></p> to change the paragraf style like color and font, and <u>, <ul>, <li> to make lists, <i> Italic, <b> for bolding the text are also allowed there.