A new 4-page html website with small CMS

I would like to build a new subscription-based website consisting of the main page and four menu buttons, leading to corresponding second pages. One of these pages will be the 'Subscription' page where customers will enter their information and enroll. Therefore I will need a small customer management system to pull each customer's 'file' (information), see and/or edit his data, grant him access priviledges to the website etc. Lastly there will be some links at the front page (shown at profitsA [login to view URL] of the attached folder) leading to pages (or just overlays, I don't mind) where I will have uploaded .html files of my own beforehand for the customers to read. These .html files will be updated regularly by me for each link there. All graphic work is already done by us, so there is nothing for you to design. Also all text, images etc will also be given to you ready to use.