Hi jmpsap,
I'd highly recommend purchasing Maximenu CK's documentation:
www.joomlack.fr/en/joomla-extension-maxi...cumentation-maximenu It's quite comprehensive and covers both these topics.
For inserting an image, basically you can create a custom HTML module with the image and text that you'd like (don't assign it to any menu items), then record the ID.
Then go to your menu in menu manager and create a new menu item of type text separator. For the title enter "[modid=yourIDHere]", then configure appropriately, while remembering to set the parent item.
As to colors, in the backend there should be options for the colors and you can also use CSS to style it.
By the way, they also have themes for purchasing and you might like one of them:
www.joomlack.fr/extension-joomla-maximenu/themes-maximenu Hope this helps!
Kind regards,
Nick