Soc net PHP, MySQL, JS, Flash ActionScript

We need experienced software engineer to finalize social network project. Tasks include general structure modification, implementation of additional pages (PHP structured as MVC, MySql, AJAX through jQuery), implementation of Flash multiuser games through SmartFox socket server (not necessary to be familiar with it - other developer knows it). ActionScript knowledge is necessary. Implementation of realtime chat and messages (nearly completed). Overall volume of work is 2 months. ATTENTION: Work will be done in the form of pair programming through desktop sharing and voice communication 8 hours per day, 5 days per week (using radmin or TeamViewer or skype), i.e. you will be working 8 hours per day with other developer. Please offer your cost estimations.