Adding customer panel/login, logout with their order history in wordpress

I've a wordpress website maintaining company's portfolio and other information and now I'm willing to add a feature where customer can signup, login and place an order by filling a simple form and can see his/her order history.

I would like to save these actions in database(MySQL) and I've the schema ready but I don't know how to implement this on wordpress.

I've seen the plugins like cForm and Baw Login/Logout but they doesn't seem to solve the problem.

I've an extensive experience in PHP development, Like OOPHP, custom PHP and framework like Yii.

Any help would be appreciated. Thanks in advance.

via Chebli Mohamed