Uploading to site (problems)

I have downloaded all the files for banner202 from your site. I have edited the banner to my taste, however now I am not sure how to post the banner to my site (www.vampyrekingdom.ning.com). Is there a code I need to be using?
If you could walk me through the steps I need to do to get it to show up on my site that would be great.

Thank you,

Yumi