This is simple straight forward project.
what is needed in general is to merge php scripts to get one website running and the script should look if they are one script. I mean the login part for all of them should be unified.
In details you will have a Social Networking script plus a WebMail script to start with and merge them together. so the base will be a Social networking scripts and other script (php scripts) will be put on this base.
there is also a home page look and feel change included in this job.
and this is just the start for the right man. we will have u merge other scrips to this base very soon. but for now your job is that simple project described above.
so bid accordingly. simple fast job.
the social networking script will be rayzz I think and the mail script will be SocketMail or MailBee probably.
let me know if u had any Questions.