I don't know if this is easy or not, but looks like pretty easy for someone who familiar with WordPress
look at the main page of [url removed, login to view], and see the "View Layouts Preview" and "Get The Code" links.
I need someone here to make me some kind of WP plugin that have the same functionality of that site. SO..in admin panel, i have the ability to put the CSS source code for the choosen friendster's layout, and user can see the preview of the layout. Kindly try that site for more explained information.
Bid with message in PMB explaining about the solution would be more considered. Thank you