Christian Mission Website Update

I need modification to an existing Christian Missions website. I am doing this free for them. So please be considerate when you bid. Every month they sent out? news letter? and they would like this to be on the internet web site. So when some one goes on the web site, they need to see the most recent news letter. Each news letter has multiple article. If some one wants to see prior months, they should be abe to. The project must be done in a way that each month will be store in seperate directory and I should be able to copy one to mke the next month.