Mailing List Archive

How to Customize Tabs on homepage of RT3.8?
How to customize the tabs on the homepage like simple
search,tools,tickets,configuration?
Also, how to add new entry in that list?

Basically, i want to be able to track my customer information along with
tickets. There is no option already available in RT to insert,view,modify
customer information. So i would like to customize it for my usecase.