Add Blog to Existing Website

HI there, We have a current website [login to view URL] - We want to add a blog to it. We do not want to change the entire site to a CMS platform unless 120% required. This job is to be started and completed ASAP. PLEASE ONLY BID WITH YOUR DESCRIPTION ON HOW YOU WILL DO THE JOB, INCLUDING WHAT YOU WILL NEED INSTALLED AT OUR SERVER SIDE -- Failing to discribe this will make your bid invalid.