Login/Logut module (php/mysql/jquery is a plus)

Hi, we need to add a login/logout/register module for our website www.mundo-forex.com. It should be in mysql and php. The system should use some session vars and cookies to maitain people registered if they wish so. The registration should ask for Name login password retype password thats it, I am a programmer, so I can extend from there if I need to add more fields, etc. A nice graphic design is a plus rgds, Matthias