loading a sitemap

Yes, this is exactly how I feel!!

I am currently trying to load a sitemap onto my website. I already have one generated, but I can't figure out how to load it. Is there some programming step that I am missing? The help section only states that you need to load it onto the highest portion of your directory. Another site tells me to load it into my root directory.

Neither tells me HOW to do this. How do I load this file into my directory? Do I go into HTML and insert it into the upper portion of the code?

Can anybody provide me with step-by-step directions on how to do this?

Thank you in advance for your help.