Group costumizing

Thank you very much for multiple groups feature but I am little bit confused how to:
1. Have only 2 groups in options and give them unique names
2. How to have different style (CSS) for each of groups by default
example
group 1 is always red and group2 is always blue
3. How to strip URL
example.
The in entered link is www.example.com then should be link http://www.example.com not htttp://www.mywebsite.com/www.example.com

http://ww.wp.xz.cn/plugins/horizontal-scrolling-announcement/