Setting Main page as home page

Hello,

I have set up a page – called Main on my blog, which is re-directed to a page ID number. How do I set this main page as my home page for my blog?

So everytime some one goes to [email protected]/blog they will see Main (page ID) rather than the home page, which at the current moment shows all the posts.

I am using the Word Press Blog as my photography blog

Any help grealtly appreciated, I know there is a way to do this, becuase it was done before (now I am re-creating my blog) on a new server.