Coder needed asap

We are looking another coder to do following works for us 1) Integratation of site 2 site need to share same login site must be integrated in the site..page. 2) Minor changes needed. Change the function we have at our current script 1) Add stats 2) Integrate refferal registration to our current site where after user register with our main site, they will automatically get refferal url id so that they can refer a friend 3) add somewhere around 10 new function to our site. Admin 1) there will be around 5 new function to be added which is just a simple one. We will only accept 100USD max. and only real coders need to bid