We have a great deal of experience in adding PHP to templates. After reviewing the project, we don't see any problems developing your solution in the4 days stated. Unlike most designers, we are an US company based in Atlanta Ga, and all designers are US based, our work is not contracted out but completed inhouse. Our work is not only guaranteed to meet your every need, but as an design and hosting company in business from 2000 we can assure the highest confidentiality in all our contracts. We have extensive experience in designing, developing and deploying complex online systems and a design staff to meet most every need in online graphic design.