https to http

i have godaddy ssl installed on the website. currently all the pages are opening with https extension. however i only want the checkout pages to open with https extentsion and i want all the other pages of the website to open with http extention. please do not try to achieve this through redirection as that would not be a proper way to do this. however, if you can fix this problem otherwise, please bid on this project. the website is written in php. this is a very urgent project. i would award this asap. please when you place your bid, indicate if you have expertise to do this. thanks kannu