Hi,
Please provide more information, it is hard to bid without knowing the "enhancements" needed. For a sample of my work, please refer to my profile (yes, all original;)). Just today finishing off a full-blown custom-made CMS, I have a long history of developing administration back-ends. Also have extensive user experience with social networking sites like friendster, orkut or myspace. I'm always welcoming long-term relationships.
Cheers,
Ed