geshiPlus has been updated to allow you to add foreground and background coloring to your included code sections. It now allows you to specify a starting line number, as well as the interval between highlighted lines.
It's not hard to coax Joomla to do something, all you need to do is add one folder and one file to your Joomla site. Here's a simple step-by-step tutorial to help you get started.
Most Joomla components provide both frontend and backend functionality. This tutorial shows you how you can create a backend for our existing component by simply copying our frontend component folder and its contents to another location and renaming one file